webhook to awx prefix

[Dees7]

hello.
I have awx with webhook to run deploy. And I'd like to pass netbox request body to awx.
AWX requere prefix "extra_vars" in POST like
{"extra_vars":{"event": "updated", "username": "admin", ... , "tags": []}}

In webhook in Netbox If "body template" is empty it send all. But if no "extra_vars" prefix AWX skip vars
{"event": "updated", "username": "admin", ... , "tags": []}

I can write template like {"extra_vars":{{data}} ..... prechange postchange username } but I'd like only to add "extra_vars" before whole and every request body.

Is there any variable for a whole body? or Can I add prefix in any ways?

[cimnine]

I think this is a question for the NetBox project; this project here is just about the Docker distribution of NetBox.