{
  "event": "appointment.created",
  "id": "evt_xxx",
  "occurredAt": "2026-05-31",
  "data": {
    "appointmentId": "apt_001",
    "serviceId": "notary-public-affidavit",
    "scheduledAt": "2026-05-31T10:00:00+07:00",
    "branch": "bangkok-silom"
  }
}