diff --git a/accounting/grpc/service_frostfs.pb.go b/accounting/grpc/service_frostfs.pb.go
index b70fd27..4f11303 100644
--- a/accounting/grpc/service_frostfs.pb.go
+++ b/accounting/grpc/service_frostfs.pb.go
@@ -98,11 +98,19 @@ func (x *BalanceRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"ownerId\":"
-		out.RawString(prefix[1:])
-		x.OwnerId.MarshalEasyJSON(out)
+		if x.OwnerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ownerId\":"
+			out.RawString(prefix)
+			x.OwnerId.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -295,21 +303,43 @@ func (x *BalanceRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -452,11 +482,19 @@ func (x *BalanceResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"balance\":"
-		out.RawString(prefix[1:])
-		x.Balance.MarshalEasyJSON(out)
+		if x.Balance != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"balance\":"
+			out.RawString(prefix)
+			x.Balance.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -649,21 +687,43 @@ func (x *BalanceResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/accounting/grpc/types_frostfs.pb.go b/accounting/grpc/types_frostfs.pb.go
index 182705e..0ae770b 100644
--- a/accounting/grpc/types_frostfs.pb.go
+++ b/accounting/grpc/types_frostfs.pb.go
@@ -113,16 +113,31 @@ func (x *Decimal) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix[1:])
-		out.Int64(x.Value)
+		if x.Value != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.Int64(x.Value)
+		}
 	}
 	{
-		const prefix string = ",\"precision\":"
-		out.RawString(prefix)
-		out.Uint32(x.Precision)
+		if x.Precision != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"precision\":"
+			out.RawString(prefix)
+			out.Uint32(x.Precision)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/acl/grpc/types_frostfs.pb.go b/acl/grpc/types_frostfs.pb.go
index b055167..57e1682 100644
--- a/acl/grpc/types_frostfs.pb.go
+++ b/acl/grpc/types_frostfs.pb.go
@@ -352,36 +352,65 @@ func (x *EACLRecord_Filter) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"headerType\":"
-		out.RawString(prefix[1:])
-		v := int32(x.HeaderType)
-		if vv, ok := HeaderType_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.HeaderType != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"headerType\":"
+			out.RawString(prefix)
+			v := int32(x.HeaderType)
+			if vv, ok := HeaderType_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	{
-		const prefix string = ",\"matchType\":"
-		out.RawString(prefix)
-		v := int32(x.MatchType)
-		if vv, ok := MatchType_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.MatchType != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"matchType\":"
+			out.RawString(prefix)
+			v := int32(x.MatchType)
+			if vv, ok := MatchType_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	{
-		const prefix string = ",\"key\":"
-		out.RawString(prefix)
-		out.String(x.Key)
+		if len(x.Key) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"key\":"
+			out.RawString(prefix)
+			out.String(x.Key)
+		}
 	}
 	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix)
-		out.String(x.Value)
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.String(x.Value)
+		}
 	}
 	out.RawByte('}')
 }
@@ -576,28 +605,43 @@ func (x *EACLRecord_Target) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"role\":"
-		out.RawString(prefix[1:])
-		v := int32(x.Role)
-		if vv, ok := Role_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.Role != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"role\":"
+			out.RawString(prefix)
+			v := int32(x.Role)
+			if vv, ok := Role_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	{
-		const prefix string = ",\"keys\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Keys {
-			if i != 0 {
+		if len(x.Keys) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.Base64Bytes(x.Keys[i])
+			const prefix string = "\"keys\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Keys {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.Base64Bytes(x.Keys[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -823,50 +867,79 @@ func (x *EACLRecord) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"operation\":"
-		out.RawString(prefix[1:])
-		v := int32(x.Operation)
-		if vv, ok := Operation_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
-		}
-	}
-	{
-		const prefix string = ",\"action\":"
-		out.RawString(prefix)
-		v := int32(x.Action)
-		if vv, ok := Action_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
-		}
-	}
-	{
-		const prefix string = ",\"filters\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Filters {
-			if i != 0 {
+		if x.Operation != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"operation\":"
+			out.RawString(prefix)
+			v := int32(x.Operation)
+			if vv, ok := Operation_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
 			}
-			x.Filters[i].MarshalEasyJSON(out)
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"targets\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Targets {
-			if i != 0 {
+		if x.Action != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"action\":"
+			out.RawString(prefix)
+			v := int32(x.Action)
+			if vv, ok := Action_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
 			}
-			x.Targets[i].MarshalEasyJSON(out)
 		}
-		out.RawByte(']')
+	}
+	{
+		if len(x.Filters) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"filters\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Filters {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Filters[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
+		}
+	}
+	{
+		if len(x.Targets) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"targets\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Targets {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Targets[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
+		}
 	}
 	out.RawByte('}')
 }
@@ -1109,28 +1182,50 @@ func (x *EACLTable) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"version\":"
-		out.RawString(prefix[1:])
-		x.Version.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"containerID\":"
-		out.RawString(prefix)
-		x.ContainerId.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"records\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Records {
-			if i != 0 {
+		if x.Version != nil {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Records[i].MarshalEasyJSON(out)
+			const prefix string = "\"version\":"
+			out.RawString(prefix)
+			x.Version.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.ContainerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"containerID\":"
+			out.RawString(prefix)
+			x.ContainerId.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if len(x.Records) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"records\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Records {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Records[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -1317,21 +1412,43 @@ func (x *BearerToken_Body_TokenLifetime) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"exp\":"
-		out.RawString(prefix[1:])
-		out.Uint64(x.Exp)
+		if x.Exp != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"exp\":"
+			out.RawString(prefix)
+			out.Uint64(x.Exp)
+		}
 	}
 	{
-		const prefix string = ",\"nbf\":"
-		out.RawString(prefix)
-		out.Uint64(x.Nbf)
+		if x.Nbf != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"nbf\":"
+			out.RawString(prefix)
+			out.Uint64(x.Nbf)
+		}
 	}
 	{
-		const prefix string = ",\"iat\":"
-		out.RawString(prefix)
-		out.Uint64(x.Iat)
+		if x.Iat != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"iat\":"
+			out.RawString(prefix)
+			out.Uint64(x.Iat)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1497,23 +1614,38 @@ func (x *BearerToken_Body_APEOverride) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"target\":"
-		out.RawString(prefix[1:])
-		x.Target.MarshalEasyJSON(out)
+		if x.Target != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"target\":"
+			out.RawString(prefix)
+			x.Target.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"chains\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Chains {
-			if i != 0 {
+		if len(x.Chains) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Chains[i].MarshalEasyJSON(out)
+			const prefix string = "\"chains\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Chains {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Chains[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -1745,31 +1877,67 @@ func (x *BearerToken_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"eaclTable\":"
-		out.RawString(prefix[1:])
-		x.EaclTable.MarshalEasyJSON(out)
+		if x.EaclTable != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"eaclTable\":"
+			out.RawString(prefix)
+			x.EaclTable.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"ownerID\":"
-		out.RawString(prefix)
-		x.OwnerId.MarshalEasyJSON(out)
+		if x.OwnerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ownerID\":"
+			out.RawString(prefix)
+			x.OwnerId.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"lifetime\":"
-		out.RawString(prefix)
-		x.Lifetime.MarshalEasyJSON(out)
+		if x.Lifetime != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"lifetime\":"
+			out.RawString(prefix)
+			x.Lifetime.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"allowImpersonate\":"
-		out.RawString(prefix)
-		out.Bool(x.AllowImpersonate)
+		if x.AllowImpersonate {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"allowImpersonate\":"
+			out.RawString(prefix)
+			out.Bool(x.AllowImpersonate)
+		}
 	}
 	{
-		const prefix string = ",\"apeOverride\":"
-		out.RawString(prefix)
-		x.ApeOverride.MarshalEasyJSON(out)
+		if x.ApeOverride != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"apeOverride\":"
+			out.RawString(prefix)
+			x.ApeOverride.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1948,16 +2116,31 @@ func (x *BearerToken) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"signature\":"
-		out.RawString(prefix)
-		x.Signature.MarshalEasyJSON(out)
+		if x.Signature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"signature\":"
+			out.RawString(prefix)
+			x.Signature.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/ape/grpc/types_frostfs.pb.go b/ape/grpc/types_frostfs.pb.go
index e19d9f6..7967e13 100644
--- a/ape/grpc/types_frostfs.pb.go
+++ b/ape/grpc/types_frostfs.pb.go
@@ -155,21 +155,36 @@ func (x *ChainTarget) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"type\":"
-		out.RawString(prefix[1:])
-		v := int32(x.Type)
-		if vv, ok := TargetType_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.Type != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"type\":"
+			out.RawString(prefix)
+			v := int32(x.Type)
+			if vv, ok := TargetType_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	{
-		const prefix string = ",\"name\":"
-		out.RawString(prefix)
-		out.String(x.Name)
+		if len(x.Name) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"name\":"
+			out.RawString(prefix)
+			out.String(x.Name)
+		}
 	}
 	out.RawByte('}')
 }
@@ -338,13 +353,21 @@ func (x *Chain) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	switch xx := x.Kind.(type) {
 	case *Chain_Raw:
 		{
-			const prefix string = ",\"raw\":"
-			out.RawString(prefix[1:])
-			out.Base64Bytes(xx.Raw)
+			if len(xx.Raw) != 0 {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"raw\":"
+				out.RawString(prefix)
+				out.Base64Bytes(xx.Raw)
+			}
 		}
 	}
 	out.RawByte('}')
diff --git a/apemanager/grpc/service_frostfs.pb.go b/apemanager/grpc/service_frostfs.pb.go
index 99abeb2..2a30850 100644
--- a/apemanager/grpc/service_frostfs.pb.go
+++ b/apemanager/grpc/service_frostfs.pb.go
@@ -121,16 +121,31 @@ func (x *AddChainRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"target\":"
-		out.RawString(prefix[1:])
-		x.Target.MarshalEasyJSON(out)
+		if x.Target != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"target\":"
+			out.RawString(prefix)
+			x.Target.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"chain\":"
-		out.RawString(prefix)
-		x.Chain.MarshalEasyJSON(out)
+		if x.Chain != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"chain\":"
+			out.RawString(prefix)
+			x.Chain.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -330,21 +345,43 @@ func (x *AddChainRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -484,11 +521,19 @@ func (x *AddChainResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"chainId\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.ChainId)
+		if len(x.ChainId) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"chainId\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.ChainId)
+		}
 	}
 	out.RawByte('}')
 }
@@ -680,21 +725,43 @@ func (x *AddChainResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -857,16 +924,31 @@ func (x *RemoveChainRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"target\":"
-		out.RawString(prefix[1:])
-		x.Target.MarshalEasyJSON(out)
+		if x.Target != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"target\":"
+			out.RawString(prefix)
+			x.Target.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"chainId\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.ChainId)
+		if len(x.ChainId) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"chainId\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.ChainId)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1065,21 +1147,43 @@ func (x *RemoveChainRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1381,21 +1485,43 @@ func (x *RemoveChainResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1538,11 +1664,19 @@ func (x *ListChainsRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"target\":"
-		out.RawString(prefix[1:])
-		x.Target.MarshalEasyJSON(out)
+		if x.Target != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"target\":"
+			out.RawString(prefix)
+			x.Target.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1735,21 +1869,43 @@ func (x *ListChainsRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1895,18 +2051,26 @@ func (x *ListChainsResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"chains\":"
-		out.RawString(prefix[1:])
-		out.RawByte('[')
-		for i := range x.Chains {
-			if i != 0 {
+		if len(x.Chains) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Chains[i].MarshalEasyJSON(out)
+			const prefix string = "\"chains\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Chains {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Chains[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -2106,21 +2270,43 @@ func (x *ListChainsResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/container/grpc/service_frostfs.pb.go b/container/grpc/service_frostfs.pb.go
index ffdc730..4ccb595 100644
--- a/container/grpc/service_frostfs.pb.go
+++ b/container/grpc/service_frostfs.pb.go
@@ -121,16 +121,31 @@ func (x *PutRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"container\":"
-		out.RawString(prefix[1:])
-		x.Container.MarshalEasyJSON(out)
+		if x.Container != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"container\":"
+			out.RawString(prefix)
+			x.Container.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"signature\":"
-		out.RawString(prefix)
-		x.Signature.MarshalEasyJSON(out)
+		if x.Signature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"signature\":"
+			out.RawString(prefix)
+			x.Signature.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -330,21 +345,43 @@ func (x *PutRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -487,11 +524,19 @@ func (x *PutResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"containerId\":"
-		out.RawString(prefix[1:])
-		x.ContainerId.MarshalEasyJSON(out)
+		if x.ContainerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"containerId\":"
+			out.RawString(prefix)
+			x.ContainerId.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -684,21 +729,43 @@ func (x *PutResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -864,16 +931,31 @@ func (x *DeleteRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"containerId\":"
-		out.RawString(prefix[1:])
-		x.ContainerId.MarshalEasyJSON(out)
+		if x.ContainerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"containerId\":"
+			out.RawString(prefix)
+			x.ContainerId.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"signature\":"
-		out.RawString(prefix)
-		x.Signature.MarshalEasyJSON(out)
+		if x.Signature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"signature\":"
+			out.RawString(prefix)
+			x.Signature.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1073,21 +1155,43 @@ func (x *DeleteRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1389,21 +1493,43 @@ func (x *DeleteResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1546,11 +1672,19 @@ func (x *GetRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"containerId\":"
-		out.RawString(prefix[1:])
-		x.ContainerId.MarshalEasyJSON(out)
+		if x.ContainerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"containerId\":"
+			out.RawString(prefix)
+			x.ContainerId.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1743,21 +1877,43 @@ func (x *GetRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1946,21 +2102,43 @@ func (x *GetResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"container\":"
-		out.RawString(prefix[1:])
-		x.Container.MarshalEasyJSON(out)
+		if x.Container != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"container\":"
+			out.RawString(prefix)
+			x.Container.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"signature\":"
-		out.RawString(prefix)
-		x.Signature.MarshalEasyJSON(out)
+		if x.Signature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"signature\":"
+			out.RawString(prefix)
+			x.Signature.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"sessionToken\":"
-		out.RawString(prefix)
-		x.SessionToken.MarshalEasyJSON(out)
+		if x.SessionToken != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"sessionToken\":"
+			out.RawString(prefix)
+			x.SessionToken.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2167,21 +2345,43 @@ func (x *GetResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2324,11 +2524,19 @@ func (x *ListRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"ownerId\":"
-		out.RawString(prefix[1:])
-		x.OwnerId.MarshalEasyJSON(out)
+		if x.OwnerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ownerId\":"
+			out.RawString(prefix)
+			x.OwnerId.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2521,21 +2729,43 @@ func (x *ListRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2681,18 +2911,26 @@ func (x *ListResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"containerIds\":"
-		out.RawString(prefix[1:])
-		out.RawByte('[')
-		for i := range x.ContainerIds {
-			if i != 0 {
+		if len(x.ContainerIds) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.ContainerIds[i].MarshalEasyJSON(out)
+			const prefix string = "\"containerIds\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.ContainerIds {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.ContainerIds[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -2892,21 +3130,43 @@ func (x *ListResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/container/grpc/types_frostfs.pb.go b/container/grpc/types_frostfs.pb.go
index 3010eb0..9db07ed 100644
--- a/container/grpc/types_frostfs.pb.go
+++ b/container/grpc/types_frostfs.pb.go
@@ -115,16 +115,31 @@ func (x *Container_Attribute) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"key\":"
-		out.RawString(prefix[1:])
-		out.String(x.Key)
+		if len(x.Key) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"key\":"
+			out.RawString(prefix)
+			out.String(x.Key)
+		}
 	}
 	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix)
-		out.String(x.Value)
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.String(x.Value)
+		}
 	}
 	out.RawByte('}')
 }
@@ -370,43 +385,86 @@ func (x *Container) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"version\":"
-		out.RawString(prefix[1:])
-		x.Version.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"ownerID\":"
-		out.RawString(prefix)
-		x.OwnerId.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"nonce\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.Nonce)
-	}
-	{
-		const prefix string = ",\"basicACL\":"
-		out.RawString(prefix)
-		out.Uint32(x.BasicAcl)
-	}
-	{
-		const prefix string = ",\"attributes\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Attributes {
-			if i != 0 {
+		if x.Version != nil {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Attributes[i].MarshalEasyJSON(out)
+			const prefix string = "\"version\":"
+			out.RawString(prefix)
+			x.Version.MarshalEasyJSON(out)
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"placementPolicy\":"
-		out.RawString(prefix)
-		x.PlacementPolicy.MarshalEasyJSON(out)
+		if x.OwnerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ownerID\":"
+			out.RawString(prefix)
+			x.OwnerId.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if len(x.Nonce) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"nonce\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Nonce)
+		}
+	}
+	{
+		if x.BasicAcl != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"basicACL\":"
+			out.RawString(prefix)
+			out.Uint32(x.BasicAcl)
+		}
+	}
+	{
+		if len(x.Attributes) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"attributes\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Attributes {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Attributes[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
+		}
+	}
+	{
+		if x.PlacementPolicy != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"placementPolicy\":"
+			out.RawString(prefix)
+			x.PlacementPolicy.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/lock/grpc/types_frostfs.pb.go b/lock/grpc/types_frostfs.pb.go
index 58be895..33f22c5 100644
--- a/lock/grpc/types_frostfs.pb.go
+++ b/lock/grpc/types_frostfs.pb.go
@@ -100,18 +100,26 @@ func (x *Lock) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"members\":"
-		out.RawString(prefix[1:])
-		out.RawByte('[')
-		for i := range x.Members {
-			if i != 0 {
+		if len(x.Members) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Members[i].MarshalEasyJSON(out)
+			const prefix string = "\"members\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Members {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Members[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
diff --git a/netmap/grpc/service_frostfs.pb.go b/netmap/grpc/service_frostfs.pb.go
index 3d62855..4d53031 100644
--- a/netmap/grpc/service_frostfs.pb.go
+++ b/netmap/grpc/service_frostfs.pb.go
@@ -257,21 +257,43 @@ func (x *LocalNodeInfoRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -437,16 +459,31 @@ func (x *LocalNodeInfoResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"version\":"
-		out.RawString(prefix[1:])
-		x.Version.MarshalEasyJSON(out)
+		if x.Version != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"version\":"
+			out.RawString(prefix)
+			x.Version.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"nodeInfo\":"
-		out.RawString(prefix)
-		x.NodeInfo.MarshalEasyJSON(out)
+		if x.NodeInfo != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"nodeInfo\":"
+			out.RawString(prefix)
+			x.NodeInfo.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -646,21 +683,43 @@ func (x *LocalNodeInfoResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -962,21 +1021,43 @@ func (x *NetworkInfoRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1119,11 +1200,19 @@ func (x *NetworkInfoResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"networkInfo\":"
-		out.RawString(prefix[1:])
-		x.NetworkInfo.MarshalEasyJSON(out)
+		if x.NetworkInfo != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"networkInfo\":"
+			out.RawString(prefix)
+			x.NetworkInfo.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1316,21 +1405,43 @@ func (x *NetworkInfoResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1632,21 +1743,43 @@ func (x *NetmapSnapshotRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1789,11 +1922,19 @@ func (x *NetmapSnapshotResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"netmap\":"
-		out.RawString(prefix[1:])
-		x.Netmap.MarshalEasyJSON(out)
+		if x.Netmap != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"netmap\":"
+			out.RawString(prefix)
+			x.Netmap.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1986,21 +2127,43 @@ func (x *NetmapSnapshotResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/netmap/grpc/types_frostfs.pb.go b/netmap/grpc/types_frostfs.pb.go
index 43af103..d082910 100644
--- a/netmap/grpc/types_frostfs.pb.go
+++ b/netmap/grpc/types_frostfs.pb.go
@@ -274,43 +274,79 @@ func (x *Filter) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"name\":"
-		out.RawString(prefix[1:])
-		out.String(x.Name)
-	}
-	{
-		const prefix string = ",\"key\":"
-		out.RawString(prefix)
-		out.String(x.Key)
-	}
-	{
-		const prefix string = ",\"op\":"
-		out.RawString(prefix)
-		v := int32(x.Op)
-		if vv, ok := Operation_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
-		}
-	}
-	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix)
-		out.String(x.Value)
-	}
-	{
-		const prefix string = ",\"filters\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Filters {
-			if i != 0 {
+		if len(x.Name) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Filters[i].MarshalEasyJSON(out)
+			const prefix string = "\"name\":"
+			out.RawString(prefix)
+			out.String(x.Name)
+		}
+	}
+	{
+		if len(x.Key) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"key\":"
+			out.RawString(prefix)
+			out.String(x.Key)
+		}
+	}
+	{
+		if x.Op != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"op\":"
+			out.RawString(prefix)
+			v := int32(x.Op)
+			if vv, ok := Operation_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
+		}
+	}
+	{
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.String(x.Value)
+		}
+	}
+	{
+		if len(x.Filters) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"filters\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Filters {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Filters[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -563,36 +599,72 @@ func (x *Selector) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"name\":"
-		out.RawString(prefix[1:])
-		out.String(x.Name)
-	}
-	{
-		const prefix string = ",\"count\":"
-		out.RawString(prefix)
-		out.Uint32(x.Count)
-	}
-	{
-		const prefix string = ",\"clause\":"
-		out.RawString(prefix)
-		v := int32(x.Clause)
-		if vv, ok := Clause_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if len(x.Name) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"name\":"
+			out.RawString(prefix)
+			out.String(x.Name)
 		}
 	}
 	{
-		const prefix string = ",\"attribute\":"
-		out.RawString(prefix)
-		out.String(x.Attribute)
+		if x.Count != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"count\":"
+			out.RawString(prefix)
+			out.Uint32(x.Count)
+		}
 	}
 	{
-		const prefix string = ",\"filter\":"
-		out.RawString(prefix)
-		out.String(x.Filter)
+		if x.Clause != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"clause\":"
+			out.RawString(prefix)
+			v := int32(x.Clause)
+			if vv, ok := Clause_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
+		}
+	}
+	{
+		if len(x.Attribute) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"attribute\":"
+			out.RawString(prefix)
+			out.String(x.Attribute)
+		}
+	}
+	{
+		if len(x.Filter) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"filter\":"
+			out.RawString(prefix)
+			out.String(x.Filter)
+		}
 	}
 	out.RawByte('}')
 }
@@ -817,26 +889,55 @@ func (x *Replica) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"count\":"
-		out.RawString(prefix[1:])
-		out.Uint32(x.Count)
+		if x.Count != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"count\":"
+			out.RawString(prefix)
+			out.Uint32(x.Count)
+		}
 	}
 	{
-		const prefix string = ",\"selector\":"
-		out.RawString(prefix)
-		out.String(x.Selector)
+		if len(x.Selector) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"selector\":"
+			out.RawString(prefix)
+			out.String(x.Selector)
+		}
 	}
 	{
-		const prefix string = ",\"ecDataCount\":"
-		out.RawString(prefix)
-		out.Uint32(x.EcDataCount)
+		if x.EcDataCount != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ecDataCount\":"
+			out.RawString(prefix)
+			out.Uint32(x.EcDataCount)
+		}
 	}
 	{
-		const prefix string = ",\"ecParityCount\":"
-		out.RawString(prefix)
-		out.Uint32(x.EcParityCount)
+		if x.EcParityCount != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ecParityCount\":"
+			out.RawString(prefix)
+			out.Uint32(x.EcParityCount)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1077,52 +1178,88 @@ func (x *PlacementPolicy) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"replicas\":"
-		out.RawString(prefix[1:])
-		out.RawByte('[')
-		for i := range x.Replicas {
-			if i != 0 {
+		if len(x.Replicas) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Replicas[i].MarshalEasyJSON(out)
+			const prefix string = "\"replicas\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Replicas {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Replicas[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"containerBackupFactor\":"
-		out.RawString(prefix)
-		out.Uint32(x.ContainerBackupFactor)
-	}
-	{
-		const prefix string = ",\"selectors\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Selectors {
-			if i != 0 {
+		if x.ContainerBackupFactor != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Selectors[i].MarshalEasyJSON(out)
+			const prefix string = "\"containerBackupFactor\":"
+			out.RawString(prefix)
+			out.Uint32(x.ContainerBackupFactor)
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"filters\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Filters {
-			if i != 0 {
+		if len(x.Selectors) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Filters[i].MarshalEasyJSON(out)
+			const prefix string = "\"selectors\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Selectors {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Selectors[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"unique\":"
-		out.RawString(prefix)
-		out.Bool(x.Unique)
+		if len(x.Filters) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"filters\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Filters {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Filters[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
+		}
+	}
+	{
+		if x.Unique {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"unique\":"
+			out.RawString(prefix)
+			out.Bool(x.Unique)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1373,28 +1510,50 @@ func (x *NodeInfo_Attribute) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"key\":"
-		out.RawString(prefix[1:])
-		out.String(x.Key)
-	}
-	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix)
-		out.String(x.Value)
-	}
-	{
-		const prefix string = ",\"parents\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Parents {
-			if i != 0 {
+		if len(x.Key) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.String(x.Parents[i])
+			const prefix string = "\"key\":"
+			out.RawString(prefix)
+			out.String(x.Key)
+		}
+	}
+	{
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.String(x.Value)
+		}
+	}
+	{
+		if len(x.Parents) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"parents\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Parents {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.String(x.Parents[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -1604,44 +1763,73 @@ func (x *NodeInfo) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"publicKey\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.PublicKey)
-	}
-	{
-		const prefix string = ",\"addresses\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Addresses {
-			if i != 0 {
+		if len(x.PublicKey) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.String(x.Addresses[i])
+			const prefix string = "\"publicKey\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.PublicKey)
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"attributes\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Attributes {
-			if i != 0 {
+		if len(x.Addresses) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Attributes[i].MarshalEasyJSON(out)
+			const prefix string = "\"addresses\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Addresses {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.String(x.Addresses[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"state\":"
-		out.RawString(prefix)
-		v := int32(x.State)
-		if vv, ok := NodeInfo_State_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if len(x.Attributes) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"attributes\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Attributes {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Attributes[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
+		}
+	}
+	{
+		if x.State != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"state\":"
+			out.RawString(prefix)
+			v := int32(x.State)
+			if vv, ok := NodeInfo_State_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	out.RawByte('}')
@@ -1842,23 +2030,38 @@ func (x *Netmap) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"epoch\":"
-		out.RawString(prefix[1:])
-		out.Uint64(x.Epoch)
+		if x.Epoch != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"epoch\":"
+			out.RawString(prefix)
+			out.Uint64(x.Epoch)
+		}
 	}
 	{
-		const prefix string = ",\"nodes\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Nodes {
-			if i != 0 {
+		if len(x.Nodes) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Nodes[i].MarshalEasyJSON(out)
+			const prefix string = "\"nodes\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Nodes {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Nodes[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -2017,16 +2220,31 @@ func (x *NetworkConfig_Parameter) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"key\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.Key)
+		if len(x.Key) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"key\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Key)
+		}
 	}
 	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.Value)
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Value)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2163,18 +2381,26 @@ func (x *NetworkConfig) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"parameters\":"
-		out.RawString(prefix[1:])
-		out.RawByte('[')
-		for i := range x.Parameters {
-			if i != 0 {
+		if len(x.Parameters) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Parameters[i].MarshalEasyJSON(out)
+			const prefix string = "\"parameters\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Parameters {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Parameters[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -2370,26 +2596,55 @@ func (x *NetworkInfo) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"currentEpoch\":"
-		out.RawString(prefix[1:])
-		out.Uint64(x.CurrentEpoch)
+		if x.CurrentEpoch != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"currentEpoch\":"
+			out.RawString(prefix)
+			out.Uint64(x.CurrentEpoch)
+		}
 	}
 	{
-		const prefix string = ",\"magicNumber\":"
-		out.RawString(prefix)
-		out.Uint64(x.MagicNumber)
+		if x.MagicNumber != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"magicNumber\":"
+			out.RawString(prefix)
+			out.Uint64(x.MagicNumber)
+		}
 	}
 	{
-		const prefix string = ",\"msPerBlock\":"
-		out.RawString(prefix)
-		out.Int64(x.MsPerBlock)
+		if x.MsPerBlock != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"msPerBlock\":"
+			out.RawString(prefix)
+			out.Int64(x.MsPerBlock)
+		}
 	}
 	{
-		const prefix string = ",\"networkConfig\":"
-		out.RawString(prefix)
-		x.NetworkConfig.MarshalEasyJSON(out)
+		if x.NetworkConfig != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"networkConfig\":"
+			out.RawString(prefix)
+			x.NetworkConfig.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/object/grpc/service_frostfs.pb.go b/object/grpc/service_frostfs.pb.go
index 188d032..2434bd3 100644
--- a/object/grpc/service_frostfs.pb.go
+++ b/object/grpc/service_frostfs.pb.go
@@ -119,16 +119,31 @@ func (x *GetRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"address\":"
-		out.RawString(prefix[1:])
-		x.Address.MarshalEasyJSON(out)
+		if x.Address != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"address\":"
+			out.RawString(prefix)
+			x.Address.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"raw\":"
-		out.RawString(prefix)
-		out.Bool(x.Raw)
+		if x.Raw {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"raw\":"
+			out.RawString(prefix)
+			out.Bool(x.Raw)
+		}
 	}
 	out.RawByte('}')
 }
@@ -327,21 +342,43 @@ func (x *GetRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -530,21 +567,43 @@ func (x *GetResponse_Body_Init) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"objectId\":"
-		out.RawString(prefix[1:])
-		x.ObjectId.MarshalEasyJSON(out)
+		if x.ObjectId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"objectId\":"
+			out.RawString(prefix)
+			x.ObjectId.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"signature\":"
-		out.RawString(prefix)
-		x.Signature.MarshalEasyJSON(out)
+		if x.Signature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"signature\":"
+			out.RawString(prefix)
+			x.Signature.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"header\":"
-		out.RawString(prefix)
-		x.Header.MarshalEasyJSON(out)
+		if x.Header != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"header\":"
+			out.RawString(prefix)
+			x.Header.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -787,31 +846,60 @@ func (x *GetResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	switch xx := x.ObjectPart.(type) {
 	case *GetResponse_Body_Init_:
 		{
-			const prefix string = ",\"init\":"
-			out.RawString(prefix[1:])
-			xx.Init.MarshalEasyJSON(out)
+			if xx.Init != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"init\":"
+				out.RawString(prefix)
+				xx.Init.MarshalEasyJSON(out)
+			}
 		}
 	case *GetResponse_Body_Chunk:
 		{
-			const prefix string = ",\"chunk\":"
-			out.RawString(prefix[1:])
-			out.Base64Bytes(xx.Chunk)
+			if len(xx.Chunk) != 0 {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"chunk\":"
+				out.RawString(prefix)
+				out.Base64Bytes(xx.Chunk)
+			}
 		}
 	case *GetResponse_Body_SplitInfo:
 		{
-			const prefix string = ",\"splitInfo\":"
-			out.RawString(prefix[1:])
-			xx.SplitInfo.MarshalEasyJSON(out)
+			if xx.SplitInfo != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"splitInfo\":"
+				out.RawString(prefix)
+				xx.SplitInfo.MarshalEasyJSON(out)
+			}
 		}
 	case *GetResponse_Body_EcInfo:
 		{
-			const prefix string = ",\"ecInfo\":"
-			out.RawString(prefix[1:])
-			xx.EcInfo.MarshalEasyJSON(out)
+			if xx.EcInfo != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"ecInfo\":"
+				out.RawString(prefix)
+				xx.EcInfo.MarshalEasyJSON(out)
+			}
 		}
 	}
 	out.RawByte('}')
@@ -1061,21 +1149,43 @@ func (x *GetResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1286,33 +1396,62 @@ func (x *PutRequest_Body_Init) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"objectId\":"
-		out.RawString(prefix[1:])
-		x.ObjectId.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"signature\":"
-		out.RawString(prefix)
-		x.Signature.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"header\":"
-		out.RawString(prefix)
-		x.Header.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"copiesNumber\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.CopiesNumber {
-			if i != 0 {
+		if x.ObjectId != nil {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.Uint32(x.CopiesNumber[i])
+			const prefix string = "\"objectId\":"
+			out.RawString(prefix)
+			x.ObjectId.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.Signature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"signature\":"
+			out.RawString(prefix)
+			x.Signature.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.Header != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"header\":"
+			out.RawString(prefix)
+			x.Header.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if len(x.CopiesNumber) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"copiesNumber\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.CopiesNumber {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.Uint32(x.CopiesNumber[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -1514,19 +1653,34 @@ func (x *PutRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	switch xx := x.ObjectPart.(type) {
 	case *PutRequest_Body_Init_:
 		{
-			const prefix string = ",\"init\":"
-			out.RawString(prefix[1:])
-			xx.Init.MarshalEasyJSON(out)
+			if xx.Init != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"init\":"
+				out.RawString(prefix)
+				xx.Init.MarshalEasyJSON(out)
+			}
 		}
 	case *PutRequest_Body_Chunk:
 		{
-			const prefix string = ",\"chunk\":"
-			out.RawString(prefix[1:])
-			out.Base64Bytes(xx.Chunk)
+			if len(xx.Chunk) != 0 {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"chunk\":"
+				out.RawString(prefix)
+				out.Base64Bytes(xx.Chunk)
+			}
 		}
 	}
 	out.RawByte('}')
@@ -1746,21 +1900,43 @@ func (x *PutRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1903,11 +2079,19 @@ func (x *PutResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"objectId\":"
-		out.RawString(prefix[1:])
-		x.ObjectId.MarshalEasyJSON(out)
+		if x.ObjectId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"objectId\":"
+			out.RawString(prefix)
+			x.ObjectId.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2100,21 +2284,43 @@ func (x *PutResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2257,11 +2463,19 @@ func (x *DeleteRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"address\":"
-		out.RawString(prefix[1:])
-		x.Address.MarshalEasyJSON(out)
+		if x.Address != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"address\":"
+			out.RawString(prefix)
+			x.Address.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2454,21 +2668,43 @@ func (x *DeleteRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2611,11 +2847,19 @@ func (x *DeleteResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"tombstone\":"
-		out.RawString(prefix[1:])
-		x.Tombstone.MarshalEasyJSON(out)
+		if x.Tombstone != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"tombstone\":"
+			out.RawString(prefix)
+			x.Tombstone.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2808,21 +3052,43 @@ func (x *DeleteResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -3005,21 +3271,43 @@ func (x *HeadRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"address\":"
-		out.RawString(prefix[1:])
-		x.Address.MarshalEasyJSON(out)
+		if x.Address != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"address\":"
+			out.RawString(prefix)
+			x.Address.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"mainOnly\":"
-		out.RawString(prefix)
-		out.Bool(x.MainOnly)
+		if x.MainOnly {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"mainOnly\":"
+			out.RawString(prefix)
+			out.Bool(x.MainOnly)
+		}
 	}
 	{
-		const prefix string = ",\"raw\":"
-		out.RawString(prefix)
-		out.Bool(x.Raw)
+		if x.Raw {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"raw\":"
+			out.RawString(prefix)
+			out.Bool(x.Raw)
+		}
 	}
 	out.RawByte('}')
 }
@@ -3224,21 +3512,43 @@ func (x *HeadRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -3404,16 +3714,31 @@ func (x *HeaderWithSignature) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"header\":"
-		out.RawString(prefix[1:])
-		x.Header.MarshalEasyJSON(out)
+		if x.Header != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"header\":"
+			out.RawString(prefix)
+			x.Header.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"signature\":"
-		out.RawString(prefix)
-		x.Signature.MarshalEasyJSON(out)
+		if x.Signature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"signature\":"
+			out.RawString(prefix)
+			x.Signature.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -3644,31 +3969,60 @@ func (x *HeadResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	switch xx := x.Head.(type) {
 	case *HeadResponse_Body_Header:
 		{
-			const prefix string = ",\"header\":"
-			out.RawString(prefix[1:])
-			xx.Header.MarshalEasyJSON(out)
+			if xx.Header != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"header\":"
+				out.RawString(prefix)
+				xx.Header.MarshalEasyJSON(out)
+			}
 		}
 	case *HeadResponse_Body_ShortHeader:
 		{
-			const prefix string = ",\"shortHeader\":"
-			out.RawString(prefix[1:])
-			xx.ShortHeader.MarshalEasyJSON(out)
+			if xx.ShortHeader != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"shortHeader\":"
+				out.RawString(prefix)
+				xx.ShortHeader.MarshalEasyJSON(out)
+			}
 		}
 	case *HeadResponse_Body_SplitInfo:
 		{
-			const prefix string = ",\"splitInfo\":"
-			out.RawString(prefix[1:])
-			xx.SplitInfo.MarshalEasyJSON(out)
+			if xx.SplitInfo != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"splitInfo\":"
+				out.RawString(prefix)
+				xx.SplitInfo.MarshalEasyJSON(out)
+			}
 		}
 	case *HeadResponse_Body_EcInfo:
 		{
-			const prefix string = ",\"ecInfo\":"
-			out.RawString(prefix[1:])
-			xx.EcInfo.MarshalEasyJSON(out)
+			if xx.EcInfo != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"ecInfo\":"
+				out.RawString(prefix)
+				xx.EcInfo.MarshalEasyJSON(out)
+			}
 		}
 	}
 	out.RawByte('}')
@@ -3919,21 +4273,43 @@ func (x *HeadResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -4113,26 +4489,48 @@ func (x *SearchRequest_Body_Filter) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"matchType\":"
-		out.RawString(prefix[1:])
-		v := int32(x.MatchType)
-		if vv, ok := MatchType_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.MatchType != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"matchType\":"
+			out.RawString(prefix)
+			v := int32(x.MatchType)
+			if vv, ok := MatchType_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	{
-		const prefix string = ",\"key\":"
-		out.RawString(prefix)
-		out.String(x.Key)
+		if len(x.Key) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"key\":"
+			out.RawString(prefix)
+			out.String(x.Key)
+		}
 	}
 	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix)
-		out.String(x.Value)
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.String(x.Value)
+		}
 	}
 	out.RawByte('}')
 }
@@ -4334,28 +4732,50 @@ func (x *SearchRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"containerId\":"
-		out.RawString(prefix[1:])
-		x.ContainerId.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"version\":"
-		out.RawString(prefix)
-		out.Uint32(x.Version)
-	}
-	{
-		const prefix string = ",\"filters\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Filters {
-			if i != 0 {
+		if x.ContainerId != nil {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Filters[i].MarshalEasyJSON(out)
+			const prefix string = "\"containerId\":"
+			out.RawString(prefix)
+			x.ContainerId.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.Version != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"version\":"
+			out.RawString(prefix)
+			out.Uint32(x.Version)
+		}
+	}
+	{
+		if len(x.Filters) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"filters\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Filters {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Filters[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -4568,21 +4988,43 @@ func (x *SearchRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -4728,18 +5170,26 @@ func (x *SearchResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"idList\":"
-		out.RawString(prefix[1:])
-		out.RawByte('[')
-		for i := range x.IdList {
-			if i != 0 {
+		if len(x.IdList) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.IdList[i].MarshalEasyJSON(out)
+			const prefix string = "\"idList\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.IdList {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.IdList[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -4939,21 +5389,43 @@ func (x *SearchResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -5113,16 +5585,31 @@ func (x *Range) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"offset\":"
-		out.RawString(prefix[1:])
-		out.Uint64(x.Offset)
+		if x.Offset != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"offset\":"
+			out.RawString(prefix)
+			out.Uint64(x.Offset)
+		}
 	}
 	{
-		const prefix string = ",\"length\":"
-		out.RawString(prefix)
-		out.Uint64(x.Length)
+		if x.Length != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"length\":"
+			out.RawString(prefix)
+			out.Uint64(x.Length)
+		}
 	}
 	out.RawByte('}')
 }
@@ -5299,21 +5786,43 @@ func (x *GetRangeRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"address\":"
-		out.RawString(prefix[1:])
-		x.Address.MarshalEasyJSON(out)
+		if x.Address != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"address\":"
+			out.RawString(prefix)
+			x.Address.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"range\":"
-		out.RawString(prefix)
-		x.Range.MarshalEasyJSON(out)
+		if x.Range != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"range\":"
+			out.RawString(prefix)
+			x.Range.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"raw\":"
-		out.RawString(prefix)
-		out.Bool(x.Raw)
+		if x.Raw {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"raw\":"
+			out.RawString(prefix)
+			out.Bool(x.Raw)
+		}
 	}
 	out.RawByte('}')
 }
@@ -5519,21 +6028,43 @@ func (x *GetRangeRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -5749,25 +6280,47 @@ func (x *GetRangeResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	switch xx := x.RangePart.(type) {
 	case *GetRangeResponse_Body_Chunk:
 		{
-			const prefix string = ",\"chunk\":"
-			out.RawString(prefix[1:])
-			out.Base64Bytes(xx.Chunk)
+			if len(xx.Chunk) != 0 {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"chunk\":"
+				out.RawString(prefix)
+				out.Base64Bytes(xx.Chunk)
+			}
 		}
 	case *GetRangeResponse_Body_SplitInfo:
 		{
-			const prefix string = ",\"splitInfo\":"
-			out.RawString(prefix[1:])
-			xx.SplitInfo.MarshalEasyJSON(out)
+			if xx.SplitInfo != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"splitInfo\":"
+				out.RawString(prefix)
+				xx.SplitInfo.MarshalEasyJSON(out)
+			}
 		}
 	case *GetRangeResponse_Body_EcInfo:
 		{
-			const prefix string = ",\"ecInfo\":"
-			out.RawString(prefix[1:])
-			xx.EcInfo.MarshalEasyJSON(out)
+			if xx.EcInfo != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"ecInfo\":"
+				out.RawString(prefix)
+				xx.EcInfo.MarshalEasyJSON(out)
+			}
 		}
 	}
 	out.RawByte('}')
@@ -6002,21 +6555,43 @@ func (x *GetRangeResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -6225,37 +6800,66 @@ func (x *GetRangeHashRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"address\":"
-		out.RawString(prefix[1:])
-		x.Address.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"ranges\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Ranges {
-			if i != 0 {
+		if x.Address != nil {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Ranges[i].MarshalEasyJSON(out)
+			const prefix string = "\"address\":"
+			out.RawString(prefix)
+			x.Address.MarshalEasyJSON(out)
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"salt\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.Salt)
+		if len(x.Ranges) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ranges\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Ranges {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Ranges[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
+		}
 	}
 	{
-		const prefix string = ",\"type\":"
-		out.RawString(prefix)
-		v := int32(x.Type)
-		if vv, ok := grpc.ChecksumType_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if len(x.Salt) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"salt\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Salt)
+		}
+	}
+	{
+		if x.Type != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"type\":"
+			out.RawString(prefix)
+			v := int32(x.Type)
+			if vv, ok := grpc.ChecksumType_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	out.RawByte('}')
@@ -6491,21 +7095,43 @@ func (x *GetRangeHashRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -6665,28 +7291,43 @@ func (x *GetRangeHashResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"type\":"
-		out.RawString(prefix[1:])
-		v := int32(x.Type)
-		if vv, ok := grpc.ChecksumType_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.Type != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"type\":"
+			out.RawString(prefix)
+			v := int32(x.Type)
+			if vv, ok := grpc.ChecksumType_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	{
-		const prefix string = ",\"hashList\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.HashList {
-			if i != 0 {
+		if len(x.HashList) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.Base64Bytes(x.HashList[i])
+			const prefix string = "\"hashList\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.HashList {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.Base64Bytes(x.HashList[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -6907,21 +7548,43 @@ func (x *GetRangeHashResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -7086,23 +7749,38 @@ func (x *PutSingleRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"object\":"
-		out.RawString(prefix[1:])
-		x.Object.MarshalEasyJSON(out)
+		if x.Object != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"object\":"
+			out.RawString(prefix)
+			x.Object.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"copiesNumber\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.CopiesNumber {
-			if i != 0 {
+		if len(x.CopiesNumber) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.Uint32(x.CopiesNumber[i])
+			const prefix string = "\"copiesNumber\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.CopiesNumber {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.Uint32(x.CopiesNumber[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -7308,21 +7986,43 @@ func (x *PutSingleRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -7624,21 +8324,43 @@ func (x *PutSingleResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -7801,16 +8523,31 @@ func (x *PatchRequest_Body_Patch) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"sourceRange\":"
-		out.RawString(prefix[1:])
-		x.SourceRange.MarshalEasyJSON(out)
+		if x.SourceRange != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"sourceRange\":"
+			out.RawString(prefix)
+			x.SourceRange.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"chunk\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.Chunk)
+		if len(x.Chunk) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"chunk\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Chunk)
+		}
 	}
 	out.RawByte('}')
 }
@@ -8014,33 +8751,62 @@ func (x *PatchRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"address\":"
-		out.RawString(prefix[1:])
-		x.Address.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"newAttributes\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.NewAttributes {
-			if i != 0 {
+		if x.Address != nil {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.NewAttributes[i].MarshalEasyJSON(out)
+			const prefix string = "\"address\":"
+			out.RawString(prefix)
+			x.Address.MarshalEasyJSON(out)
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"replaceAttributes\":"
-		out.RawString(prefix)
-		out.Bool(x.ReplaceAttributes)
+		if len(x.NewAttributes) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"newAttributes\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.NewAttributes {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.NewAttributes[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
+		}
 	}
 	{
-		const prefix string = ",\"patch\":"
-		out.RawString(prefix)
-		x.Patch.MarshalEasyJSON(out)
+		if x.ReplaceAttributes {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"replaceAttributes\":"
+			out.RawString(prefix)
+			out.Bool(x.ReplaceAttributes)
+		}
+	}
+	{
+		if x.Patch != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"patch\":"
+			out.RawString(prefix)
+			x.Patch.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -8260,21 +9026,43 @@ func (x *PatchRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -8417,11 +9205,19 @@ func (x *PatchResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"objectId\":"
-		out.RawString(prefix[1:])
-		x.ObjectId.MarshalEasyJSON(out)
+		if x.ObjectId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"objectId\":"
+			out.RawString(prefix)
+			x.ObjectId.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -8614,21 +9410,43 @@ func (x *PatchResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/object/grpc/types_frostfs.pb.go b/object/grpc/types_frostfs.pb.go
index 9fc2769..5b1eb2c 100644
--- a/object/grpc/types_frostfs.pb.go
+++ b/object/grpc/types_frostfs.pb.go
@@ -304,46 +304,96 @@ func (x *ShortHeader) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"version\":"
-		out.RawString(prefix[1:])
-		x.Version.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"creationEpoch\":"
-		out.RawString(prefix)
-		out.Uint64(x.CreationEpoch)
-	}
-	{
-		const prefix string = ",\"ownerID\":"
-		out.RawString(prefix)
-		x.OwnerId.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"objectType\":"
-		out.RawString(prefix)
-		v := int32(x.ObjectType)
-		if vv, ok := ObjectType_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.Version != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"version\":"
+			out.RawString(prefix)
+			x.Version.MarshalEasyJSON(out)
 		}
 	}
 	{
-		const prefix string = ",\"payloadLength\":"
-		out.RawString(prefix)
-		out.Uint64(x.PayloadLength)
+		if x.CreationEpoch != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"creationEpoch\":"
+			out.RawString(prefix)
+			out.Uint64(x.CreationEpoch)
+		}
 	}
 	{
-		const prefix string = ",\"payloadHash\":"
-		out.RawString(prefix)
-		x.PayloadHash.MarshalEasyJSON(out)
+		if x.OwnerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ownerID\":"
+			out.RawString(prefix)
+			x.OwnerId.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"homomorphicHash\":"
-		out.RawString(prefix)
-		x.HomomorphicHash.MarshalEasyJSON(out)
+		if x.ObjectType != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"objectType\":"
+			out.RawString(prefix)
+			v := int32(x.ObjectType)
+			if vv, ok := ObjectType_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
+		}
+	}
+	{
+		if x.PayloadLength != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"payloadLength\":"
+			out.RawString(prefix)
+			out.Uint64(x.PayloadLength)
+		}
+	}
+	{
+		if x.PayloadHash != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"payloadHash\":"
+			out.RawString(prefix)
+			x.PayloadHash.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.HomomorphicHash != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"homomorphicHash\":"
+			out.RawString(prefix)
+			x.HomomorphicHash.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -544,16 +594,31 @@ func (x *Header_Attribute) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"key\":"
-		out.RawString(prefix[1:])
-		out.String(x.Key)
+		if len(x.Key) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"key\":"
+			out.RawString(prefix)
+			out.String(x.Key)
+		}
 	}
 	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix)
-		out.String(x.Value)
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.String(x.Value)
+		}
 	}
 	out.RawByte('}')
 }
@@ -802,43 +867,86 @@ func (x *Header_Split) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"parent\":"
-		out.RawString(prefix[1:])
-		x.Parent.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"previous\":"
-		out.RawString(prefix)
-		x.Previous.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"parentSignature\":"
-		out.RawString(prefix)
-		x.ParentSignature.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"parentHeader\":"
-		out.RawString(prefix)
-		x.ParentHeader.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"children\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Children {
-			if i != 0 {
+		if x.Parent != nil {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Children[i].MarshalEasyJSON(out)
+			const prefix string = "\"parent\":"
+			out.RawString(prefix)
+			x.Parent.MarshalEasyJSON(out)
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"splitID\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.SplitId)
+		if x.Previous != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"previous\":"
+			out.RawString(prefix)
+			x.Previous.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.ParentSignature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"parentSignature\":"
+			out.RawString(prefix)
+			x.ParentSignature.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.ParentHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"parentHeader\":"
+			out.RawString(prefix)
+			x.ParentHeader.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if len(x.Children) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"children\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Children {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Children[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
+		}
+	}
+	{
+		if len(x.SplitId) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"splitID\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.SplitId)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1157,53 +1265,110 @@ func (x *Header_EC) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"parent\":"
-		out.RawString(prefix[1:])
-		x.Parent.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"index\":"
-		out.RawString(prefix)
-		out.Uint32(x.Index)
-	}
-	{
-		const prefix string = ",\"total\":"
-		out.RawString(prefix)
-		out.Uint32(x.Total)
-	}
-	{
-		const prefix string = ",\"headerLength\":"
-		out.RawString(prefix)
-		out.Uint32(x.HeaderLength)
-	}
-	{
-		const prefix string = ",\"header\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.Header)
-	}
-	{
-		const prefix string = ",\"parentSplitID\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.ParentSplitId)
-	}
-	{
-		const prefix string = ",\"parentSplitParentID\":"
-		out.RawString(prefix)
-		x.ParentSplitParentId.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"parentAttributes\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.ParentAttributes {
-			if i != 0 {
+		if x.Parent != nil {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.ParentAttributes[i].MarshalEasyJSON(out)
+			const prefix string = "\"parent\":"
+			out.RawString(prefix)
+			x.Parent.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.Index != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"index\":"
+			out.RawString(prefix)
+			out.Uint32(x.Index)
+		}
+	}
+	{
+		if x.Total != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"total\":"
+			out.RawString(prefix)
+			out.Uint32(x.Total)
+		}
+	}
+	{
+		if x.HeaderLength != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"headerLength\":"
+			out.RawString(prefix)
+			out.Uint32(x.HeaderLength)
+		}
+	}
+	{
+		if len(x.Header) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"header\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Header)
+		}
+	}
+	{
+		if len(x.ParentSplitId) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"parentSplitID\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.ParentSplitId)
+		}
+	}
+	{
+		if x.ParentSplitParentId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"parentSplitParentID\":"
+			out.RawString(prefix)
+			x.ParentSplitParentId.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if len(x.ParentAttributes) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"parentAttributes\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.ParentAttributes {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.ParentAttributes[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -1630,78 +1795,163 @@ func (x *Header) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"version\":"
-		out.RawString(prefix[1:])
-		x.Version.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"containerID\":"
-		out.RawString(prefix)
-		x.ContainerId.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"ownerID\":"
-		out.RawString(prefix)
-		x.OwnerId.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"creationEpoch\":"
-		out.RawString(prefix)
-		out.Uint64(x.CreationEpoch)
-	}
-	{
-		const prefix string = ",\"payloadLength\":"
-		out.RawString(prefix)
-		out.Uint64(x.PayloadLength)
-	}
-	{
-		const prefix string = ",\"payloadHash\":"
-		out.RawString(prefix)
-		x.PayloadHash.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"objectType\":"
-		out.RawString(prefix)
-		v := int32(x.ObjectType)
-		if vv, ok := ObjectType_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
-		}
-	}
-	{
-		const prefix string = ",\"homomorphicHash\":"
-		out.RawString(prefix)
-		x.HomomorphicHash.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"sessionToken\":"
-		out.RawString(prefix)
-		x.SessionToken.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"attributes\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Attributes {
-			if i != 0 {
+		if x.Version != nil {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Attributes[i].MarshalEasyJSON(out)
+			const prefix string = "\"version\":"
+			out.RawString(prefix)
+			x.Version.MarshalEasyJSON(out)
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"split\":"
-		out.RawString(prefix)
-		x.Split.MarshalEasyJSON(out)
+		if x.ContainerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"containerID\":"
+			out.RawString(prefix)
+			x.ContainerId.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"ec\":"
-		out.RawString(prefix)
-		x.Ec.MarshalEasyJSON(out)
+		if x.OwnerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ownerID\":"
+			out.RawString(prefix)
+			x.OwnerId.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.CreationEpoch != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"creationEpoch\":"
+			out.RawString(prefix)
+			out.Uint64(x.CreationEpoch)
+		}
+	}
+	{
+		if x.PayloadLength != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"payloadLength\":"
+			out.RawString(prefix)
+			out.Uint64(x.PayloadLength)
+		}
+	}
+	{
+		if x.PayloadHash != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"payloadHash\":"
+			out.RawString(prefix)
+			x.PayloadHash.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.ObjectType != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"objectType\":"
+			out.RawString(prefix)
+			v := int32(x.ObjectType)
+			if vv, ok := ObjectType_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
+		}
+	}
+	{
+		if x.HomomorphicHash != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"homomorphicHash\":"
+			out.RawString(prefix)
+			x.HomomorphicHash.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.SessionToken != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"sessionToken\":"
+			out.RawString(prefix)
+			x.SessionToken.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if len(x.Attributes) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"attributes\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Attributes {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Attributes[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
+		}
+	}
+	{
+		if x.Split != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"split\":"
+			out.RawString(prefix)
+			x.Split.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.Ec != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ec\":"
+			out.RawString(prefix)
+			x.Ec.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1993,26 +2243,55 @@ func (x *Object) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"objectID\":"
-		out.RawString(prefix[1:])
-		x.ObjectId.MarshalEasyJSON(out)
+		if x.ObjectId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"objectID\":"
+			out.RawString(prefix)
+			x.ObjectId.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"signature\":"
-		out.RawString(prefix)
-		x.Signature.MarshalEasyJSON(out)
+		if x.Signature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"signature\":"
+			out.RawString(prefix)
+			x.Signature.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"header\":"
-		out.RawString(prefix)
-		x.Header.MarshalEasyJSON(out)
+		if x.Header != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"header\":"
+			out.RawString(prefix)
+			x.Header.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"payload\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.Payload)
+		if len(x.Payload) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"payload\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Payload)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2204,21 +2483,43 @@ func (x *SplitInfo) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"splitId\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.SplitId)
+		if len(x.SplitId) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"splitId\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.SplitId)
+		}
 	}
 	{
-		const prefix string = ",\"lastPart\":"
-		out.RawString(prefix)
-		x.LastPart.MarshalEasyJSON(out)
+		if x.LastPart != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"lastPart\":"
+			out.RawString(prefix)
+			x.LastPart.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"link\":"
-		out.RawString(prefix)
-		x.Link.MarshalEasyJSON(out)
+		if x.Link != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"link\":"
+			out.RawString(prefix)
+			x.Link.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2400,21 +2701,43 @@ func (x *ECInfo_Chunk) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"id\":"
-		out.RawString(prefix[1:])
-		x.Id.MarshalEasyJSON(out)
+		if x.Id != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"id\":"
+			out.RawString(prefix)
+			x.Id.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"index\":"
-		out.RawString(prefix)
-		out.Uint32(x.Index)
+		if x.Index != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"index\":"
+			out.RawString(prefix)
+			out.Uint32(x.Index)
+		}
 	}
 	{
-		const prefix string = ",\"total\":"
-		out.RawString(prefix)
-		out.Uint32(x.Total)
+		if x.Total != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"total\":"
+			out.RawString(prefix)
+			out.Uint32(x.Total)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2558,18 +2881,26 @@ func (x *ECInfo) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"chunks\":"
-		out.RawString(prefix[1:])
-		out.RawByte('[')
-		for i := range x.Chunks {
-			if i != 0 {
+		if len(x.Chunks) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Chunks[i].MarshalEasyJSON(out)
+			const prefix string = "\"chunks\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Chunks {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Chunks[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
diff --git a/refs/grpc/types_frostfs.pb.go b/refs/grpc/types_frostfs.pb.go
index 5f35eba..869620f 100644
--- a/refs/grpc/types_frostfs.pb.go
+++ b/refs/grpc/types_frostfs.pb.go
@@ -190,16 +190,31 @@ func (x *Address) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"containerID\":"
-		out.RawString(prefix[1:])
-		x.ContainerId.MarshalEasyJSON(out)
+		if x.ContainerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"containerID\":"
+			out.RawString(prefix)
+			x.ContainerId.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"objectID\":"
-		out.RawString(prefix)
-		x.ObjectId.MarshalEasyJSON(out)
+		if x.ObjectId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"objectID\":"
+			out.RawString(prefix)
+			x.ObjectId.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -332,11 +347,19 @@ func (x *ObjectID) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.Value)
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Value)
+		}
 	}
 	out.RawByte('}')
 }
@@ -461,11 +484,19 @@ func (x *ContainerID) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.Value)
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Value)
+		}
 	}
 	out.RawByte('}')
 }
@@ -590,11 +621,19 @@ func (x *OwnerID) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.Value)
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Value)
+		}
 	}
 	out.RawByte('}')
 }
@@ -739,16 +778,31 @@ func (x *Version) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"major\":"
-		out.RawString(prefix[1:])
-		out.Uint32(x.Major)
+		if x.Major != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"major\":"
+			out.RawString(prefix)
+			out.Uint32(x.Major)
+		}
 	}
 	{
-		const prefix string = ",\"minor\":"
-		out.RawString(prefix)
-		out.Uint32(x.Minor)
+		if x.Minor != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"minor\":"
+			out.RawString(prefix)
+			out.Uint32(x.Minor)
+		}
 	}
 	out.RawByte('}')
 }
@@ -919,25 +973,47 @@ func (x *Signature) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"key\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.Key)
+		if len(x.Key) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"key\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Key)
+		}
 	}
 	{
-		const prefix string = ",\"signature\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.Sign)
+		if len(x.Sign) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"signature\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Sign)
+		}
 	}
 	{
-		const prefix string = ",\"scheme\":"
-		out.RawString(prefix)
-		v := int32(x.Scheme)
-		if vv, ok := SignatureScheme_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.Scheme != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"scheme\":"
+			out.RawString(prefix)
+			v := int32(x.Scheme)
+			if vv, ok := SignatureScheme_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	out.RawByte('}')
@@ -1111,16 +1187,31 @@ func (x *SignatureRFC6979) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"key\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.Key)
+		if len(x.Key) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"key\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Key)
+		}
 	}
 	{
-		const prefix string = ",\"signature\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.Sign)
+		if len(x.Sign) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"signature\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Sign)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1271,21 +1362,36 @@ func (x *Checksum) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"type\":"
-		out.RawString(prefix[1:])
-		v := int32(x.Type)
-		if vv, ok := ChecksumType_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.Type != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"type\":"
+			out.RawString(prefix)
+			v := int32(x.Type)
+			if vv, ok := ChecksumType_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	{
-		const prefix string = ",\"sum\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.Sum)
+		if len(x.Sum) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"sum\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Sum)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/session/grpc/service_frostfs.pb.go b/session/grpc/service_frostfs.pb.go
index aa42ee8..a3f0111 100644
--- a/session/grpc/service_frostfs.pb.go
+++ b/session/grpc/service_frostfs.pb.go
@@ -117,16 +117,31 @@ func (x *CreateRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"ownerId\":"
-		out.RawString(prefix[1:])
-		x.OwnerId.MarshalEasyJSON(out)
+		if x.OwnerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ownerId\":"
+			out.RawString(prefix)
+			x.OwnerId.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"expiration\":"
-		out.RawString(prefix)
-		out.Uint64(x.Expiration)
+		if x.Expiration != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"expiration\":"
+			out.RawString(prefix)
+			out.Uint64(x.Expiration)
+		}
 	}
 	out.RawByte('}')
 }
@@ -325,21 +340,43 @@ func (x *CreateRequest) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -499,16 +536,31 @@ func (x *CreateResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"id\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.Id)
+		if len(x.Id) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"id\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Id)
+		}
 	}
 	{
-		const prefix string = ",\"sessionKey\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.SessionKey)
+		if len(x.SessionKey) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"sessionKey\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.SessionKey)
+		}
 	}
 	out.RawByte('}')
 }
@@ -706,21 +758,43 @@ func (x *CreateResponse) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaHeader\":"
-		out.RawString(prefix)
-		x.MetaHeader.MarshalEasyJSON(out)
+		if x.MetaHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaHeader\":"
+			out.RawString(prefix)
+			x.MetaHeader.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"verifyHeader\":"
-		out.RawString(prefix)
-		x.VerifyHeader.MarshalEasyJSON(out)
+		if x.VerifyHeader != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verifyHeader\":"
+			out.RawString(prefix)
+			x.VerifyHeader.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/session/grpc/types_frostfs.pb.go b/session/grpc/types_frostfs.pb.go
index c92ab28..58807fe 100644
--- a/session/grpc/types_frostfs.pb.go
+++ b/session/grpc/types_frostfs.pb.go
@@ -179,23 +179,38 @@ func (x *ObjectSessionContext_Target) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"container\":"
-		out.RawString(prefix[1:])
-		x.Container.MarshalEasyJSON(out)
+		if x.Container != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"container\":"
+			out.RawString(prefix)
+			x.Container.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"objects\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Objects {
-			if i != 0 {
+		if len(x.Objects) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Objects[i].MarshalEasyJSON(out)
+			const prefix string = "\"objects\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Objects {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Objects[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
@@ -358,21 +373,36 @@ func (x *ObjectSessionContext) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"verb\":"
-		out.RawString(prefix[1:])
-		v := int32(x.Verb)
-		if vv, ok := ObjectSessionContext_Verb_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.Verb != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verb\":"
+			out.RawString(prefix)
+			v := int32(x.Verb)
+			if vv, ok := ObjectSessionContext_Verb_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	{
-		const prefix string = ",\"target\":"
-		out.RawString(prefix)
-		x.Target.MarshalEasyJSON(out)
+		if x.Target != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"target\":"
+			out.RawString(prefix)
+			x.Target.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -601,26 +631,48 @@ func (x *ContainerSessionContext) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"verb\":"
-		out.RawString(prefix[1:])
-		v := int32(x.Verb)
-		if vv, ok := ContainerSessionContext_Verb_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.Verb != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"verb\":"
+			out.RawString(prefix)
+			v := int32(x.Verb)
+			if vv, ok := ContainerSessionContext_Verb_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	{
-		const prefix string = ",\"wildcard\":"
-		out.RawString(prefix)
-		out.Bool(x.Wildcard)
+		if x.Wildcard {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"wildcard\":"
+			out.RawString(prefix)
+			out.Bool(x.Wildcard)
+		}
 	}
 	{
-		const prefix string = ",\"containerID\":"
-		out.RawString(prefix)
-		x.ContainerId.MarshalEasyJSON(out)
+		if x.ContainerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"containerID\":"
+			out.RawString(prefix)
+			x.ContainerId.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -814,21 +866,43 @@ func (x *SessionToken_Body_TokenLifetime) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"exp\":"
-		out.RawString(prefix[1:])
-		out.Uint64(x.Exp)
+		if x.Exp != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"exp\":"
+			out.RawString(prefix)
+			out.Uint64(x.Exp)
+		}
 	}
 	{
-		const prefix string = ",\"nbf\":"
-		out.RawString(prefix)
-		out.Uint64(x.Nbf)
+		if x.Nbf != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"nbf\":"
+			out.RawString(prefix)
+			out.Uint64(x.Nbf)
+		}
 	}
 	{
-		const prefix string = ",\"iat\":"
-		out.RawString(prefix)
-		out.Uint64(x.Iat)
+		if x.Iat != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"iat\":"
+			out.RawString(prefix)
+			out.Uint64(x.Iat)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1095,39 +1169,82 @@ func (x *SessionToken_Body) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"id\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.Id)
+		if len(x.Id) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"id\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Id)
+		}
 	}
 	{
-		const prefix string = ",\"ownerID\":"
-		out.RawString(prefix)
-		x.OwnerId.MarshalEasyJSON(out)
+		if x.OwnerId != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ownerID\":"
+			out.RawString(prefix)
+			x.OwnerId.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"lifetime\":"
-		out.RawString(prefix)
-		x.Lifetime.MarshalEasyJSON(out)
+		if x.Lifetime != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"lifetime\":"
+			out.RawString(prefix)
+			x.Lifetime.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"sessionKey\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.SessionKey)
+		if len(x.SessionKey) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"sessionKey\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.SessionKey)
+		}
 	}
 	switch xx := x.Context.(type) {
 	case *SessionToken_Body_Object:
 		{
-			const prefix string = ",\"object\":"
-			out.RawString(prefix)
-			xx.Object.MarshalEasyJSON(out)
+			if xx.Object != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"object\":"
+				out.RawString(prefix)
+				xx.Object.MarshalEasyJSON(out)
+			}
 		}
 	case *SessionToken_Body_Container:
 		{
-			const prefix string = ",\"container\":"
-			out.RawString(prefix)
-			xx.Container.MarshalEasyJSON(out)
+			if xx.Container != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"container\":"
+				out.RawString(prefix)
+				xx.Container.MarshalEasyJSON(out)
+			}
 		}
 	}
 	out.RawByte('}')
@@ -1333,16 +1450,31 @@ func (x *SessionToken) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"body\":"
-		out.RawString(prefix[1:])
-		x.Body.MarshalEasyJSON(out)
+		if x.Body != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"body\":"
+			out.RawString(prefix)
+			x.Body.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"signature\":"
-		out.RawString(prefix)
-		x.Signature.MarshalEasyJSON(out)
+		if x.Signature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"signature\":"
+			out.RawString(prefix)
+			x.Signature.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1495,16 +1627,31 @@ func (x *XHeader) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"key\":"
-		out.RawString(prefix[1:])
-		out.String(x.Key)
+		if len(x.Key) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"key\":"
+			out.RawString(prefix)
+			out.String(x.Key)
+		}
 	}
 	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix)
-		out.String(x.Value)
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.String(x.Value)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1793,53 +1940,110 @@ func (x *RequestMetaHeader) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"version\":"
-		out.RawString(prefix[1:])
-		x.Version.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"epoch\":"
-		out.RawString(prefix)
-		out.Uint64(x.Epoch)
-	}
-	{
-		const prefix string = ",\"ttl\":"
-		out.RawString(prefix)
-		out.Uint32(x.Ttl)
-	}
-	{
-		const prefix string = ",\"xHeaders\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.XHeaders {
-			if i != 0 {
+		if x.Version != nil {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.XHeaders[i].MarshalEasyJSON(out)
+			const prefix string = "\"version\":"
+			out.RawString(prefix)
+			x.Version.MarshalEasyJSON(out)
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"sessionToken\":"
-		out.RawString(prefix)
-		x.SessionToken.MarshalEasyJSON(out)
+		if x.Epoch != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"epoch\":"
+			out.RawString(prefix)
+			out.Uint64(x.Epoch)
+		}
 	}
 	{
-		const prefix string = ",\"bearerToken\":"
-		out.RawString(prefix)
-		x.BearerToken.MarshalEasyJSON(out)
+		if x.Ttl != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ttl\":"
+			out.RawString(prefix)
+			out.Uint32(x.Ttl)
+		}
 	}
 	{
-		const prefix string = ",\"origin\":"
-		out.RawString(prefix)
-		x.Origin.MarshalEasyJSON(out)
+		if len(x.XHeaders) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"xHeaders\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.XHeaders {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.XHeaders[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
+		}
 	}
 	{
-		const prefix string = ",\"magicNumber\":"
-		out.RawString(prefix)
-		out.Uint64(x.MagicNumber)
+		if x.SessionToken != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"sessionToken\":"
+			out.RawString(prefix)
+			x.SessionToken.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.BearerToken != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"bearerToken\":"
+			out.RawString(prefix)
+			x.BearerToken.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.Origin != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"origin\":"
+			out.RawString(prefix)
+			x.Origin.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.MagicNumber != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"magicNumber\":"
+			out.RawString(prefix)
+			out.Uint64(x.MagicNumber)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2133,43 +2337,86 @@ func (x *ResponseMetaHeader) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"version\":"
-		out.RawString(prefix[1:])
-		x.Version.MarshalEasyJSON(out)
-	}
-	{
-		const prefix string = ",\"epoch\":"
-		out.RawString(prefix)
-		out.Uint64(x.Epoch)
-	}
-	{
-		const prefix string = ",\"ttl\":"
-		out.RawString(prefix)
-		out.Uint32(x.Ttl)
-	}
-	{
-		const prefix string = ",\"xHeaders\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.XHeaders {
-			if i != 0 {
+		if x.Version != nil {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.XHeaders[i].MarshalEasyJSON(out)
+			const prefix string = "\"version\":"
+			out.RawString(prefix)
+			x.Version.MarshalEasyJSON(out)
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"origin\":"
-		out.RawString(prefix)
-		x.Origin.MarshalEasyJSON(out)
+		if x.Epoch != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"epoch\":"
+			out.RawString(prefix)
+			out.Uint64(x.Epoch)
+		}
 	}
 	{
-		const prefix string = ",\"status\":"
-		out.RawString(prefix)
-		x.Status.MarshalEasyJSON(out)
+		if x.Ttl != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"ttl\":"
+			out.RawString(prefix)
+			out.Uint32(x.Ttl)
+		}
+	}
+	{
+		if len(x.XHeaders) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"xHeaders\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.XHeaders {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.XHeaders[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
+		}
+	}
+	{
+		if x.Origin != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"origin\":"
+			out.RawString(prefix)
+			x.Origin.MarshalEasyJSON(out)
+		}
+	}
+	{
+		if x.Status != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"status\":"
+			out.RawString(prefix)
+			x.Status.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2407,26 +2654,55 @@ func (x *RequestVerificationHeader) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"bodySignature\":"
-		out.RawString(prefix[1:])
-		x.BodySignature.MarshalEasyJSON(out)
+		if x.BodySignature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"bodySignature\":"
+			out.RawString(prefix)
+			x.BodySignature.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaSignature\":"
-		out.RawString(prefix)
-		x.MetaSignature.MarshalEasyJSON(out)
+		if x.MetaSignature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaSignature\":"
+			out.RawString(prefix)
+			x.MetaSignature.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"originSignature\":"
-		out.RawString(prefix)
-		x.OriginSignature.MarshalEasyJSON(out)
+		if x.OriginSignature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"originSignature\":"
+			out.RawString(prefix)
+			x.OriginSignature.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"origin\":"
-		out.RawString(prefix)
-		x.Origin.MarshalEasyJSON(out)
+		if x.Origin != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"origin\":"
+			out.RawString(prefix)
+			x.Origin.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
@@ -2645,26 +2921,55 @@ func (x *ResponseVerificationHeader) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"bodySignature\":"
-		out.RawString(prefix[1:])
-		x.BodySignature.MarshalEasyJSON(out)
+		if x.BodySignature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"bodySignature\":"
+			out.RawString(prefix)
+			x.BodySignature.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"metaSignature\":"
-		out.RawString(prefix)
-		x.MetaSignature.MarshalEasyJSON(out)
+		if x.MetaSignature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"metaSignature\":"
+			out.RawString(prefix)
+			x.MetaSignature.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"originSignature\":"
-		out.RawString(prefix)
-		x.OriginSignature.MarshalEasyJSON(out)
+		if x.OriginSignature != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"originSignature\":"
+			out.RawString(prefix)
+			x.OriginSignature.MarshalEasyJSON(out)
+		}
 	}
 	{
-		const prefix string = ",\"origin\":"
-		out.RawString(prefix)
-		x.Origin.MarshalEasyJSON(out)
+		if x.Origin != nil {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"origin\":"
+			out.RawString(prefix)
+			x.Origin.MarshalEasyJSON(out)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/status/grpc/types_frostfs.pb.go b/status/grpc/types_frostfs.pb.go
index 29dfebe..7581dbe 100644
--- a/status/grpc/types_frostfs.pb.go
+++ b/status/grpc/types_frostfs.pb.go
@@ -368,16 +368,31 @@ func (x *Status_Detail) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"id\":"
-		out.RawString(prefix[1:])
-		out.Uint32(x.Id)
+		if x.Id != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"id\":"
+			out.RawString(prefix)
+			out.Uint32(x.Id)
+		}
 	}
 	{
-		const prefix string = ",\"value\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.Value)
+		if len(x.Value) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"value\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.Value)
+		}
 	}
 	out.RawByte('}')
 }
@@ -554,28 +569,50 @@ func (x *Status) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"code\":"
-		out.RawString(prefix[1:])
-		out.Uint32(x.Code)
-	}
-	{
-		const prefix string = ",\"message\":"
-		out.RawString(prefix)
-		out.String(x.Message)
-	}
-	{
-		const prefix string = ",\"details\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Details {
-			if i != 0 {
+		if x.Code != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Details[i].MarshalEasyJSON(out)
+			const prefix string = "\"code\":"
+			out.RawString(prefix)
+			out.Uint32(x.Code)
+		}
+	}
+	{
+		if len(x.Message) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"message\":"
+			out.RawString(prefix)
+			out.String(x.Message)
+		}
+	}
+	{
+		if len(x.Details) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"details\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Details {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Details[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
diff --git a/tombstone/grpc/types_frostfs.pb.go b/tombstone/grpc/types_frostfs.pb.go
index f7bc48c..79afdfc 100644
--- a/tombstone/grpc/types_frostfs.pb.go
+++ b/tombstone/grpc/types_frostfs.pb.go
@@ -140,28 +140,50 @@ func (x *Tombstone) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"expirationEpoch\":"
-		out.RawString(prefix[1:])
-		out.Uint64(x.ExpirationEpoch)
-	}
-	{
-		const prefix string = ",\"splitID\":"
-		out.RawString(prefix)
-		out.Base64Bytes(x.SplitId)
-	}
-	{
-		const prefix string = ",\"members\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.Members {
-			if i != 0 {
+		if x.ExpirationEpoch != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.Members[i].MarshalEasyJSON(out)
+			const prefix string = "\"expirationEpoch\":"
+			out.RawString(prefix)
+			out.Uint64(x.ExpirationEpoch)
+		}
+	}
+	{
+		if len(x.SplitId) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"splitID\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.SplitId)
+		}
+	}
+	{
+		if len(x.Members) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"members\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.Members {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.Members[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
diff --git a/util/proto/test/custom/test_frostfs.pb.go b/util/proto/test/custom/test_frostfs.pb.go
index 005d6d1..03f3ece 100644
--- a/util/proto/test/custom/test_frostfs.pb.go
+++ b/util/proto/test/custom/test_frostfs.pb.go
@@ -130,11 +130,19 @@ func (x *Primitives_Aux) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"innerField\":"
-		out.RawString(prefix[1:])
-		out.Uint32(x.InnerField)
+		if x.InnerField != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"innerField\":"
+			out.RawString(prefix)
+			out.Uint32(x.InnerField)
+		}
 	}
 	out.RawByte('}')
 }
@@ -560,85 +568,184 @@ func (x *Primitives) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"fieldA\":"
-		out.RawString(prefix[1:])
-		out.Base64Bytes(x.FieldA)
+		if len(x.FieldA) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"fieldA\":"
+			out.RawString(prefix)
+			out.Base64Bytes(x.FieldA)
+		}
 	}
 	{
-		const prefix string = ",\"fieldB\":"
-		out.RawString(prefix)
-		out.String(x.FieldB)
+		if len(x.FieldB) != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"fieldB\":"
+			out.RawString(prefix)
+			out.String(x.FieldB)
+		}
 	}
 	{
-		const prefix string = ",\"fieldC\":"
-		out.RawString(prefix)
-		out.Bool(x.FieldC)
+		if x.FieldC {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"fieldC\":"
+			out.RawString(prefix)
+			out.Bool(x.FieldC)
+		}
 	}
 	{
-		const prefix string = ",\"fieldD\":"
-		out.RawString(prefix)
-		out.Int32(x.FieldD)
+		if x.FieldD != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"fieldD\":"
+			out.RawString(prefix)
+			out.Int32(x.FieldD)
+		}
 	}
 	{
-		const prefix string = ",\"fieldE\":"
-		out.RawString(prefix)
-		out.Uint32(x.FieldE)
+		if x.FieldE != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"fieldE\":"
+			out.RawString(prefix)
+			out.Uint32(x.FieldE)
+		}
 	}
 	{
-		const prefix string = ",\"fieldF\":"
-		out.RawString(prefix)
-		out.Int64(x.FieldF)
+		if x.FieldF != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"fieldF\":"
+			out.RawString(prefix)
+			out.Int64(x.FieldF)
+		}
 	}
 	{
-		const prefix string = ",\"fieldG\":"
-		out.RawString(prefix)
-		out.Uint64(x.FieldG)
+		if x.FieldG != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"fieldG\":"
+			out.RawString(prefix)
+			out.Uint64(x.FieldG)
+		}
 	}
 	{
-		const prefix string = ",\"fieldI\":"
-		out.RawString(prefix)
-		out.Uint64(x.FieldI)
+		if x.FieldI != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"fieldI\":"
+			out.RawString(prefix)
+			out.Uint64(x.FieldI)
+		}
 	}
 	{
-		const prefix string = ",\"fieldJ\":"
-		out.RawString(prefix)
-		out.Float64(x.FieldJ)
+		if x.FieldJ != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"fieldJ\":"
+			out.RawString(prefix)
+			out.Float64(x.FieldJ)
+		}
 	}
 	{
-		const prefix string = ",\"fieldK\":"
-		out.RawString(prefix)
-		out.Uint32(x.FieldK)
+		if x.FieldK != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"fieldK\":"
+			out.RawString(prefix)
+			out.Uint32(x.FieldK)
+		}
 	}
 	{
-		const prefix string = ",\"fieldH\":"
-		out.RawString(prefix)
-		v := int32(x.FieldH)
-		if vv, ok := Primitives_SomeEnum_name[v]; ok {
-			out.String(vv)
-		} else {
-			out.Int32(v)
+		if x.FieldH != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"fieldH\":"
+			out.RawString(prefix)
+			v := int32(x.FieldH)
+			if vv, ok := Primitives_SomeEnum_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}
 		}
 	}
 	switch xx := x.FieldM.(type) {
 	case *Primitives_FieldMa:
 		{
-			const prefix string = ",\"fieldMa\":"
-			out.RawString(prefix)
-			out.Base64Bytes(xx.FieldMa)
+			if len(xx.FieldMa) != 0 {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"fieldMa\":"
+				out.RawString(prefix)
+				out.Base64Bytes(xx.FieldMa)
+			}
 		}
 	case *Primitives_FieldMe:
 		{
-			const prefix string = ",\"fieldMe\":"
-			out.RawString(prefix)
-			out.Uint32(xx.FieldMe)
+			if xx.FieldMe != 0 {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"fieldMe\":"
+				out.RawString(prefix)
+				out.Uint32(xx.FieldMe)
+			}
 		}
 	case *Primitives_FieldAux:
 		{
-			const prefix string = ",\"fieldAux\":"
-			out.RawString(prefix)
-			xx.FieldAux.MarshalEasyJSON(out)
+			if xx.FieldAux != nil {
+				if !first {
+					out.RawByte(',')
+				} else {
+					first = false
+				}
+				const prefix string = "\"fieldAux\":"
+				out.RawString(prefix)
+				xx.FieldAux.MarshalEasyJSON(out)
+			}
 		}
 	}
 	out.RawByte('}')
@@ -887,11 +994,19 @@ func (x *RepPrimitives_Aux) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"innerField\":"
-		out.RawString(prefix[1:])
-		out.Uint32(x.InnerField)
+		if x.InnerField != 0 {
+			if !first {
+				out.RawByte(',')
+			} else {
+				first = false
+			}
+			const prefix string = "\"innerField\":"
+			out.RawString(prefix)
+			out.Uint32(x.InnerField)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1169,102 +1284,159 @@ func (x *RepPrimitives) MarshalEasyJSON(out *jwriter.Writer) {
 		out.RawString("null")
 		return
 	}
+	first := true
 	out.RawByte('{')
 	{
-		const prefix string = ",\"fieldA\":"
-		out.RawString(prefix[1:])
-		out.RawByte('[')
-		for i := range x.FieldA {
-			if i != 0 {
+		if len(x.FieldA) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.Base64Bytes(x.FieldA[i])
+			const prefix string = "\"fieldA\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.FieldA {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.Base64Bytes(x.FieldA[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"fieldB\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.FieldB {
-			if i != 0 {
+		if len(x.FieldB) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.String(x.FieldB[i])
+			const prefix string = "\"fieldB\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.FieldB {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.String(x.FieldB[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"fieldC\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.FieldC {
-			if i != 0 {
+		if len(x.FieldC) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.Int32(x.FieldC[i])
+			const prefix string = "\"fieldC\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.FieldC {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.Int32(x.FieldC[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"fieldD\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.FieldD {
-			if i != 0 {
+		if len(x.FieldD) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.Uint32(x.FieldD[i])
+			const prefix string = "\"fieldD\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.FieldD {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.Uint32(x.FieldD[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"fieldE\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.FieldE {
-			if i != 0 {
+		if len(x.FieldE) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.Int64(x.FieldE[i])
+			const prefix string = "\"fieldE\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.FieldE {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.Int64(x.FieldE[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"fieldF\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.FieldF {
-			if i != 0 {
+		if len(x.FieldF) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.Uint64(x.FieldF[i])
+			const prefix string = "\"fieldF\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.FieldF {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.Uint64(x.FieldF[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"fieldFu\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.FieldFu {
-			if i != 0 {
+		if len(x.FieldFu) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			out.Uint64(x.FieldFu[i])
+			const prefix string = "\"fieldFu\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.FieldFu {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				out.Uint64(x.FieldFu[i])
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	{
-		const prefix string = ",\"fieldAux\":"
-		out.RawString(prefix)
-		out.RawByte('[')
-		for i := range x.FieldAux {
-			if i != 0 {
+		if len(x.FieldAux) != 0 {
+			if !first {
 				out.RawByte(',')
+			} else {
+				first = false
 			}
-			x.FieldAux[i].MarshalEasyJSON(out)
+			const prefix string = "\"fieldAux\":"
+			out.RawString(prefix)
+			out.RawByte('[')
+			for i := range x.FieldAux {
+				if i != 0 {
+					out.RawByte(',')
+				}
+				x.FieldAux[i].MarshalEasyJSON(out)
+			}
+			out.RawByte(']')
 		}
-		out.RawByte(']')
 	}
 	out.RawByte('}')
 }
diff --git a/util/protogen/internalgengo/json.go b/util/protogen/internalgengo/json.go
index 95a06d5..ec70155 100644
--- a/util/protogen/internalgengo/json.go
+++ b/util/protogen/internalgengo/json.go
@@ -147,8 +147,11 @@ func emitJSONMarshal(g *protogen.GeneratedFile, msg *protogen.Message) {
 	g.P("func (x *", msg.GoIdent.GoName, ") MarshalEasyJSON(out *", jwriterPackage.Ident("Writer"), ") {")
 	g.P(`if x == nil { out.RawString("null"); return }`)
 
+	if len(msg.Fields) != 0 {
+		g.P("first := true")
+	}
 	g.P("out.RawByte('{')")
-	for i, f := range msg.Fields {
+	for _, f := range msg.Fields {
 		if f.Oneof != nil {
 			if f.Oneof.Fields[0] != f {
 				continue
@@ -157,29 +160,35 @@ func emitJSONMarshal(g *protogen.GeneratedFile, msg *protogen.Message) {
 			g.P("switch xx := x.", f.Oneof.GoName, ".(type) {")
 			for _, ff := range f.Oneof.Fields {
 				g.P("case *", ff.GoIdent, ":")
-				emitJSONFieldWrite(g, ff, "xx", i == 0)
+				emitJSONFieldWrite(g, ff, "xx")
 			}
 			g.P("}")
 			continue
 		}
-		emitJSONFieldWrite(g, f, "x", i == 0)
+		emitJSONFieldWrite(g, f, "x")
 	}
 	g.P("out.RawByte('}')")
 	g.P("}")
 }
 
-func emitJSONFieldWrite(g *protogen.GeneratedFile, f *protogen.Field, name string, first bool) {
+func emitJSONFieldWrite(g *protogen.GeneratedFile, f *protogen.Field, name string) {
 	g.P("{")
 	defer g.P("}")
 
-	g.P("const prefix string = ", `",\"`, fieldJSONName(f), `\":"`)
-	if first {
-		g.P("out.RawString(prefix[1:])")
-	} else {
-		g.P("out.RawString(prefix)")
-	}
-
 	selector := name + "." + f.GoName
+
+	isNotDefault := notNil
+	if f.Desc.IsList() {
+		isNotDefault = notEmpty
+	} else if f.Desc.Kind() != protoreflect.MessageKind {
+		_, isNotDefault = easyprotoKindInfo(f.Desc.Kind())
+	}
+	g.P("if ", isNotDefault(selector), "{")
+	defer g.P("}")
+
+	g.P("if !first { out.RawByte(','); } else { first = false; }")
+	g.P("const prefix string = ", `"\"`, fieldJSONName(f), `\":"`)
+	g.P("out.RawString(prefix)")
 	if f.Desc.IsList() {
 		selector += "[i]"
 		g.P("out.RawByte('[')")