retrieves content for a user based on their contact ID and specified surface IDs, while also handling authentication and error cases.
The ID of the user for which you want to retrieve content.
The UUID v4 IDs of the surfaces for which you want to retrieve content.
Successful Response
UUID v4 id for the surface
"9815c123-51ce-4ad6-a4c7-2915d5e61638"
UUID v4 id for the content assignment
"c52d6c8c-14f4-4229-9a63-3c799917ceac"
Total number of alternates
1