Data Action to ServiceNow Incident returning 400 Bad Request on outbound wrap-up

How should I properly to map the conversation ID from an outbound dialing completion event to a ServiceNow incident via a Data Action webhook?

We are running an outbound campaign in the EU1 region and the integration breaks immediately after agent wrap-up. The Genesys Cloud Data Action consistently returns a 400 error when attempting to push the interaction payload to the ServiceNow REST API endpoint.

Environment details:

  • Genesys Cloud EU1, Data Action v2
  • ServiceNow London instance (Tokyo release)
  • Trigger: Conversation ended (Outbound)
  • Error: "error": "Invalid JSON payload structure for incident creation"

The payload structure matches the documentation exactly, but ServiceNow rejects the sys_id reference field when it originates from the outbound campaign context.