diff --git a/v2/signature/sign.go b/v2/signature/sign.go
index e17e90e..086ce0d 100644
--- a/v2/signature/sign.go
+++ b/v2/signature/sign.go
@@ -6,7 +6,10 @@ import (
 
 	"github.com/nspcc-dev/neofs-api-go/util/signature"
 	"github.com/nspcc-dev/neofs-api-go/v2/accounting"
+	"github.com/nspcc-dev/neofs-api-go/v2/container"
+	"github.com/nspcc-dev/neofs-api-go/v2/object"
 	"github.com/nspcc-dev/neofs-api-go/v2/service"
+	"github.com/nspcc-dev/neofs-api-go/v2/session"
 	"github.com/pkg/errors"
 )
 
@@ -286,11 +289,75 @@ func verifyServiceMessagePart(part stableMarshaler, sigRdr func() *service.Signa
 
 func serviceMessageBody(req interface{}) stableMarshaler {
 	switch v := req.(type) {
+	default:
+		panic(fmt.Sprintf("unsupported service message %T", req))
+
+		/* Accounting */
 	case *accounting.BalanceRequest:
 		return v.GetBody()
 	case *accounting.BalanceResponse:
 		return v.GetBody()
-	default:
-		panic(fmt.Sprintf("unsupported service message %T", req))
+
+		/* Session */
+	case *session.CreateRequest:
+		return v.GetBody()
+	case *session.CreateResponse:
+		return v.GetBody()
+
+		/* Container */
+	case *container.PutRequest:
+		return v.GetBody()
+	case *container.PutResponse:
+		return v.GetBody()
+	case *container.DeleteRequest:
+		return v.GetBody()
+	case *container.DeleteResponse:
+		return v.GetBody()
+	case *container.GetRequest:
+		return v.GetBody()
+	case *container.GetResponse:
+		return v.GetBody()
+	case *container.ListRequest:
+		return v.GetBody()
+	case *container.ListResponse:
+		return v.GetBody()
+	case *container.SetExtendedACLRequest:
+		return v.GetBody()
+	case *container.SetExtendedACLResponse:
+		return v.GetBody()
+	case *container.GetExtendedACLRequest:
+		return v.GetBody()
+	case *container.GetExtendedACLResponse:
+		return v.GetBody()
+
+		/* Object */
+	case *object.PutRequest:
+		return v.GetBody()
+	case *object.PutResponse:
+		return v.GetBody()
+	case *object.GetRequest:
+		return v.GetBody()
+	case *object.GetResponse:
+		return v.GetBody()
+	case *object.HeadRequest:
+		return v.GetBody()
+	case *object.HeadResponse:
+		return v.GetBody()
+	case *object.SearchRequest:
+		return v.GetBody()
+	case *object.SearchResponse:
+		return v.GetBody()
+	case *object.DeleteRequest:
+		return v.GetBody()
+	case *object.DeleteResponse:
+		return v.GetBody()
+	case *object.GetRangeRequest:
+		return v.GetBody()
+	case *object.GetRangeResponse:
+		return v.GetBody()
+	case *object.GetRangeHashRequest:
+		return v.GetBody()
+	case *object.GetRangeHashResponse:
+		return v.GetBody()
 	}
 }