What’s the best way to map our existing Zendesk ticket lists to Genesys Cloud Outbound campaigns via the API? We are hitting a 400 Bad Request on the /api/v2/outbound/campaigns endpoint with the message ‘Invalid contact list format’. The JSON structure matches the docs but fails validation. Since we are migrating from Zendesk, is there a specific field mapping requirement for the contact list that differs from the standard GC schema? We need to replicate the old Zendesk view logic exactly.