Outbound Campaign Data Action 400: Invalid JSON at $.contact.attributes

General Discussion
1

Could someone explain the strict schema validation behavior for Data Actions triggered by outbound campaign events? We are encountering a recurring 400 Bad Request when attempting to push contact disposition metadata from a Genesys Cloud outbound campaign to a ServiceNow instance via a custom REST API endpoint. The error response explicitly states: "error": "Invalid JSON structure at path $.contact.attributes". This failure occurs immediately after a call concludes, regardless of whether the disposition is Answered or No Answer. The payload structure has been validated against the ServiceNow API documentation and matches the expected nested object format for attributes. Interestingly, manual POST requests to the same ServiceNow endpoint using identical JSON structures succeed without issue, suggesting the problem lies within how Genesys Cloud serializes or truncates the webhook payload during the high-volume outbound campaign execution.

We are utilizing the latest Genesys Cloud platform version and have configured the Data Action to trigger on the conversation:dispositioned event. The Architect flow handles the outbound dialing logic, and we have verified that all required contact attributes are populated in the campaign list before the call initiates. The issue appears to be intermittent, affecting approximately 15% of all outbound calls, which correlates with peak concurrency times. We suspect there might be a race condition in the webhook delivery or a specific character encoding issue within the contact notes that breaks the JSON parser on the ServiceNow side. Has anyone successfully implemented a robust error-handling mechanism or payload sanitization step within the Data Action configuration to prevent these schema validation errors? We need a reliable method to ensure data integrity for compliance reporting without manual intervention.

2

The problem is likely that a type mismatch in the payload structure expected by the Data Action definition.

# Ensure attributes are a map, not a list
attributes = {
 disposition = "accepted"
 notes = "valid json"
}

Verify the schema definition matches the JSON structure exactly to avoid parsing errors.

3

Make sure you validate the payload structure before deployment.

  1. Define attributes as a map in the Data Action configuration.
  2. Ensure nested values are strictly key-value pairs, not arrays.
  3. Test with a minimal schema to isolate type mismatches.

This prevents the 400 error during outbound execution.

4

If I remember correctly, this validation error often stems from missing required fields in the CSV header rather than the API itself. Ensure your import file includes recording_rule_id and status columns.

  1. Check the Data Action schema definition.
  2. Verify attributes is defined as an object, not an array.
  3. Retest with a minimal payload to confirm structure.