trying to submit a form by api - how to create the payload?

hi everyone -

i'm trying to get a form filled in through the api. A regular issue is "easy" I just fill in the consecutive numbers and put the text in.

I have another form that has conditional logic and [proforma] fields in it. I can't quite figure out how to create the answer payload.

i queried and go the json of the form definition. There's a questions stanza. I put in the numbers from that and it still complains that it is "UNPROCESSABLE_ENTITY"  

Some of the form definitions have JIra fields, so i created a "fields" stanza in the form submission. It still errors

I'm getting both UNPROCESSABLE_ENTITY and invalid form data in my response. 

I have google'd and even tried AI.  I cannot quite get the nail on the head.

Rather than waste too much more time, i'm hoping that someone can steer me in the right direction(s) on how to create the answer payload

many thanks,
Rich