Structure of "job" JSON

I understand that at the very least there is

job["id"]

job["id"]

job["id"]

job["id"] and

job["input"]

job["input"]

job["input"]

job["input"] and we utilize it.
It will help me a great deal if I could send additional information like

job["source"]

job["source"]

job["source"]

job["source"] or other metadata to the handler function.
It seems like no matter how I structure the JSON, only

id

id

id

id and

input

input

input

input end up in the job JSON to the handler.

Is this indeed the case?

I prefer not to force additional metadata inside the

input

input

input

input field ... I want a separation between the model's inputs and the handler controllers.