code: def send_raw_tx(self, serialized_tx, id=None, endpoint=None):
          
          return self._call_endpoint(SEND_TX, params=[serialized_tx], id=id, endpoint=endpoint)
docs: Submits a serialized tx to the network
          Args:
              serialized_tx: (str) a hexlified string of a transaction
              id: (int, optional) id to use for response tracking
              endpoint: (RPCEndpoint, optional) endpoint to specify to use
          Returns:
              bool: whether the tx was accepted or not