How to set format of MQTT message to store into Mongo

[Deleted user]

Dear author

I want to store my MQTT messages from EMQTT to Mongo.
I am confusing how can I set the format of these message before storing into Mongo.
For example, the format of message as a Json object I want to store is:
{ value: 10,
topic: 'mqtt',
qos: 0, }

Hope you have. Thank you so much.

[turtleDeng]

@duythang emqx/emqx#1086