code: def get_max_sequence_id(self):
          
          response = self._send(http_method='GET',
                                location_id='e4a70778-cb2c-4e85-b7cc-3f3c7ae2d408',
                                version='5.0')
          return self._deserialize('long', response)
docs: GetMaxSequenceId.
          Read the max sequence id of all the identities.
          :rtype: long