corpus/invalid/event-empty-payload.json

{
  "dcp_version": "1.0",
  "message_id": "msg_empty01",
  "message_type": "task.updated",
  "issued_at": "2026-06-29T10:00:00Z",
  "body": {
    "event_id": "evt_empty01",
    "entity_type": "task",
    "verb": "updated",
    "entity_id": "task_x"
  }
}