diff --git a/v2/object/json.go b/v2/object/json.go
index 19c0018b..3cf35848 100644
--- a/v2/object/json.go
+++ b/v2/object/json.go
@@ -84,3 +84,23 @@ func (h *Header) UnmarshalJSON(data []byte) error {
 
 	return nil
 }
+
+func (h *HeaderWithSignature) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		EmitUnpopulated: true,
+	}.Marshal(
+		HeaderWithSignatureToGRPCMessage(h),
+	)
+}
+
+func (h *HeaderWithSignature) UnmarshalJSON(data []byte) error {
+	msg := new(object.HeaderWithSignature)
+
+	if err := protojson.Unmarshal(data, msg); err != nil {
+		return err
+	}
+
+	*h = *HeaderWithSignatureFromGRPCMessage(msg)
+
+	return nil
+}
diff --git a/v2/object/json_test.go b/v2/object/json_test.go
index 917dc7a0..87d05c98 100644
--- a/v2/object/json_test.go
+++ b/v2/object/json_test.go
@@ -54,3 +54,15 @@ func TestHeaderJSON(t *testing.T) {
 
 	require.Equal(t, h, h2)
 }
+
+func TestHeaderWithSignatureJSON(t *testing.T) {
+	h := generateHeaderWithSignature()
+
+	data, err := h.MarshalJSON()
+	require.NoError(t, err)
+
+	h2 := new(object.HeaderWithSignature)
+	require.NoError(t, h2.UnmarshalJSON(data))
+
+	require.Equal(t, h, h2)
+}
diff --git a/v2/object/marshal.go b/v2/object/marshal.go
index 9a5eec29..0728cb6f 100644
--- a/v2/object/marshal.go
+++ b/v2/object/marshal.go
@@ -475,6 +475,17 @@ func (h *HeaderWithSignature) StableSize() (size int) {
 	return size
 }
 
+func (h *HeaderWithSignature) Unmarshal(data []byte) error {
+	m := new(object.HeaderWithSignature)
+	if err := goproto.Unmarshal(data, m); err != nil {
+		return err
+	}
+
+	*h = *HeaderWithSignatureFromGRPCMessage(m)
+
+	return nil
+}
+
 func (o *Object) StableMarshal(buf []byte) ([]byte, error) {
 	if o == nil {
 		return []byte{}, nil
diff --git a/v2/object/marshal_test.go b/v2/object/marshal_test.go
index 62f7d09b..dbaf2f35 100644
--- a/v2/object/marshal_test.go
+++ b/v2/object/marshal_test.go
@@ -352,6 +352,20 @@ func TestGetRangeHashResponseBody_StableMarshal(t *testing.T) {
 	})
 }
 
+func TestHeaderWithSignature_StableMarshal(t *testing.T) {
+	from := generateHeaderWithSignature()
+
+	t.Run("non empty", func(t *testing.T) {
+		wire, err := from.StableMarshal(nil)
+		require.NoError(t, err)
+
+		to := new(object.HeaderWithSignature)
+		require.NoError(t, to.Unmarshal(wire))
+
+		require.Equal(t, from, to)
+	})
+}
+
 func generateOwner(id string) *refs.OwnerID {
 	owner := new(refs.OwnerID)
 	owner.SetValue([]byte(id))
@@ -582,12 +596,8 @@ func generateHeadResponseBody(flag bool) *object.HeadResponseBody {
 		short.SetShortHeader(generateShortHeader("short id"))
 		part = short
 	} else {
-		hdrWithSig := new(object.HeaderWithSignature)
-		hdrWithSig.SetHeader(generateHeader(30))
-		hdrWithSig.SetSignature(generateSignature("sig", "key"))
-
 		full := new(object.GetHeaderPartFull)
-		full.SetHeaderWithSignature(hdrWithSig)
+		full.SetHeaderWithSignature(generateHeaderWithSignature())
 		part = full
 	}
 
@@ -596,6 +606,14 @@ func generateHeadResponseBody(flag bool) *object.HeadResponseBody {
 	return req
 }
 
+func generateHeaderWithSignature() *object.HeaderWithSignature {
+	hdrWithSig := new(object.HeaderWithSignature)
+	hdrWithSig.SetHeader(generateHeader(30))
+	hdrWithSig.SetSignature(generateSignature("sig", "key"))
+
+	return hdrWithSig
+}
+
 func generateFilter(k, v string) *object.SearchFilter {
 	f := new(object.SearchFilter)
 	f.SetKey(k)