API JSON for image uploads (Bravo to Xano)

I'm struggling to set up the API to receive an image upload from an app.
All other POST requests work pretty well from the front end but I get a 500 error when working with image uploads. I'm using Bravo as the front end.

The content upload in the Xano API is well set up and works in the backend, but I'm unable to pass the parameters from Bravo since i cant seem to locate the json field to bind the image request to.

Also creating an image_url field in the inputs that I pass to the image metadata variable in the function stack returns an error saying 'wrong input'

I must be missing something.