MQTT raw non-JSON payload format?

MQTT raw non-JSON payload format?

@FuJi Kok Fook-Kee

For MQTT, I understand that TagoIO backend support JSON format like:
{“variable”: “payload”, “value”: “1122334455”}
&
{ “payload”: 1122334455}

But does it support raw non-JSON payload format like 1122334455? Any payload parser snippet example available?