Cobrowse session initiation returns 400 on POST /api/v2/conversations/cobrowse

Attempting to start a cobrowse session via POST to /api/v2/conversations/cobrowse. The payload includes the target user id and session configuration.

Getting a 400 Bad Request response with an empty body. No validation error details are returned to help debug the input schema mismatch.

Is there a specific format required for the session metadata object?