inputs=input_map, outputs=output_map
      )
      signature_map = {'main': signature}

      tags = {tag_constants.SERVING}
      v1_builder = builder.SavedModelBuilder(self._input_saved_model_path)
      v1_builder.add_meta_graph_and_variables(
          sess, tags, signature_def_map=signature_map
      )
      v1_builder.save()