{
  "type": "subscription.trial_started",
  "messageId": "a6ce...",
  "traceId": "549a...",
  "id": "subscription-id",
  "status": "IN_TRIAL",
  "startDate": "2022-04-10T00:00:00.001Z",
  "endDate": "2022-05-10T00:00:00.001Z",
  "trialEndDate": "2022-05-10T00:00:00.001Z",
  "billingPeriod": "MONTHLY",
  "metadata": {
    "testKey": "example value"
  },
  "isDowngrade": true,
  "isUpgrade": false
}