Event envelope

{
  "id": "evt_2nQv8c9aZmYHKr1...",
  "type": "customer.health_score_dropped",
  "created_at": "2026-05-26T18:42:00.000Z",
  "org_id": "org_2bH...",
  "livemode": true,
  "api_version": "v1",
  "data": {
    "object": {
      "id": "cus_2N...",
      "display_id": 4218,
      "name": "Acme Corp",
      "health_score": 38,
      "previous_health_score": 72
    },
    "previous_attributes": {
      "health_score": 72
    }
  }
}