{
  "event": "subscription.plan_changed",
  "timestamp": "2026-06-23T14:30:00.000Z",
  "organizationId": "8f14e45f-ceea-4e7a-9c3d-1c2b3a4d5e6f",
  "mode": "live",
  "apiVersion": "2026-08-27",
  "data": {
    "subscriptionId": "sub_1a2b3c4d",
    "customerId": "user_123",
    "previousPlan": {
      "id": "pln_starter",
      "name": "Starter"
    },
    "currentPlan": {
      "id": "pln_pro",
      "name": "Pro"
    },
    "billingInterval": "monthly",
    "credit": 1500,
    "charge": 4900,
    "totalCharged": 3400
  }
}