{
  "request": {
    "method": "POST",
    "url": "https://services.walgreens.com/api/vaccine/scheduling/hold/v1",
    "headers": {
      "Content-Type": "application/json"
    },
    "body": {
      "apiKey": "YOUR_API_KEY",
      "affId": "YOUR_AFFILIATE_ID",
      "locationId": "store-4152",
      "appointmentDate": "2026-05-10T09:30:00-05:00",
      "slot": "09:30 am",
      "channel": "Mobile",
      "client": "MyHealthApp",
      "engagementType": "Guest",
      "vaccines": [
        {
          "code": "207",
          "productId": "covid-moderna-2026",
          "rxRequired": false
        }
      ]
    }
  },
  "response": {
    "status": 200,
    "body": {
      "engagementId": "eng-a1b2c3d4-e5f6-7890-abcd-ef1234567890"
    }
  }
}