diff --git a/pkg/services/object/sign.go b/pkg/services/object/sign.go
index faad2648..2f4f9cb9 100644
--- a/pkg/services/object/sign.go
+++ b/pkg/services/object/sign.go
@@ -122,6 +122,7 @@ func (s *SignService) Head(ctx context.Context, req *object.HeadRequest) (*objec
 }
 
 func (s *SignService) PutSingle(ctx context.Context, req *object.PutSingleRequest) (*object.PutSingleResponse, error) {
+	req.GetBody().SetMarshalData(nil)
 	if err := s.sigSvc.VerifyRequest(req); err != nil {
 		resp := new(object.PutSingleResponse)
 		return resp, s.sigSvc.SignResponse(resp, err)