diff --git a/v2/signature/sign.go b/v2/signature/sign.go
index 3a898de..f006bfb 100644
--- a/v2/signature/sign.go
+++ b/v2/signature/sign.go
@@ -370,5 +370,9 @@ func serviceMessageBody(req interface{}) stableMarshaler {
 		return v.GetBody()
 	case *netmap.LocalNodeInfoResponse:
 		return v.GetBody()
+	case *netmap.NetworkInfoRequest:
+		return v.GetBody()
+	case *netmap.NetworkInfoResponse:
+		return v.GetBody()
 	}
 }