Sending Webhooks with Content-Type header : 'multipart/form-data'

[GreenFlux]

Does anyone have experience sending webhooks from AppSheet that include ‘multipart/form-data’ Content-Type?

I’m working with the FreshDesk API, and trying to submit a POST with a body that contains Text, and an array of attachments. Is this even possible with AppSheet?

There is a FORM_URL_ENCODED type, but not ‘multipart/form-data’.