docs: def token_submit(self, token_id, json_data={}):
          """ Submits a given token, along with optional data """
          uri = 'tokens/%s' % token_id
          post_body = json.dumps(json_data)
  
          resp, body = self.post(uri, post_body)
          self.expected_success(200, resp.status)
          body = json.loads(body)
          return rest_client.ResponseBody(resp, body)