def METHOD_NAME(self, packet_type: str, payload: bytes) -> None:
    """Private method to dispatch meta.
    Args:
        packet_type: Packet type (currently always "M")
        payload: Meta payload (JSON encoded as bytes).
    """
    payload_map = json.loads(payload)
    _type = payload_map.get("type")
    if isinstance(payload_map, dict):
        self.on_meta(_type, payload_map)