The field in question is an Attachment field.

This is what my POST looks like (from Power Automate Desktop. Note variables are enclosed in %s). The field in question is highlighted

I receive this error

{"error":{"type":"INVALID_ATTACHMENT_OBJECT","message":"Invalid attachment object for field Lawsuit Docs - PDF: \\"https://drive.google.com/file/d/1Y_4OYYb7NjIKremnh3aiuFFEh6smESFK/view?usp=drivesdk\""}}

TIA