Create a Ticket with Attachments

Hello!
I’m trying to create, using Intercom API, a ticket with one or more attachments.

I’ve created a Ticket Type that contains one Ticket Type Attribute (named Files) of data_type ‘files’.

Then, following the API documentation for the POST request to create a ticket, I’ve created this payload:

That, as long as the Files are an empty array ([]) works out.

If I try to add the files data, I always receive this kind of error:

Couple of details:

• I’ve read the other similar question here with no luck
• • I have tried all the combinations for Files, like, a list of objects with one entry, an object containing a files property that is a list of objects and so on and so forth. Nothing.
• I’ve checked the API documentation and this entry https://developers.intercom.com/docs/references/2.9/rest-api/api.intercom.io/Models/file_attribute/ is aligned with what I did, but still not working
• I wasn’t able to find anywhere a specifics for the files data_type
• I checked the github repos but I always find info related to conversation attachments, not ticket.

I have no other ideas...anyone could please help me?

One other question:

I have to provide an URL for the file(s). This URL will be referenced in the ticket (meaning that the URL must point to a persistent item) or will be somehow ingested by intercom and this means that the URL can be a temporary one, valid for the time requested by intercom to fetch it and upload internally?

Many thanks