How to send an audio file from a webhook email to an HTTP request as multipart/form-data?

Hi everyone,

I’m receiving an audio file via a webhook email in Make (the attachment comes as binary/IMTBuffer data).
I need to send this file in an HTTP module request, using multipart/form-data, exactly as if I was uploading a file from my computer (like selecting a file in Postman or Insomnia).

What’s the correct way in Make to convert the incoming file data into a real file object so that the HTTP module can send it as a field in multipart/form-data?file

Thanks for your help!