I have a Heygen account with an AI avatar. To facilitate video creation, I want to:
- Send an audio file from Telegram to ManyChat.
- Send the audio file to Make.
- Have Make send the audio file to Heygen to create a video.
- Have Heygen return the video file to ManyChat.
The Make part is working fine, but this is my first time using ManyChat and I'm having trouble configuring it to receive the audio file as a custom field to send to Make. I've only found options for text fields. Is it possible to receive an audio file from a user and save it for later use in the flow? Thank you.

