Getting rx data through MQTT

I am new to LoRa and MQTT and I have question about getting data through MQTT.
Is it possible to get by chosing correct topic only data field from rx payload or this needs to be done on client side of MQTT?

For now i have got my topic to this format:
which returns me entire rx payload, but I am interested only in data field.

Thanks in advance for answer.

There is no way to only get the data field and not get the RX/TX meta-data. But is that an issue? As on the receiver side you could ignore the fields you’re not interested in.