Impossible to response empty list from app.listener

[artas728]

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/asyncio/tasks.py", line 280, in __step
    result = coro.send(None)
  File "./venv/lib/python3.8/site-packages/panini/nats_client.py", line 339, in call
    await self.publish_func(reply_to, response)
  File "./venv/lib/python3.8/site-packages/panini/nats_client.py", line 247, in _publish
    message = self.format_message_data_type(message, data_type)
  File "./venv/lib/python3.8/site-packages/panini/nats_client.py", line 233, in format_message_data_type
    raise DataTypeError(
panini.exceptions.DataTypeError: Expected dict but got <class 'list'>