{
  "request": {
    "method": "POST",
    "url": "https://api.reflect.run/v1/tests/1001/executions",
    "headers": {
      "X-API-KEY": "{your_api_key}",
      "Content-Type": "application/json"
    },
    "body": {
      "overrides": {
        "hostnames": [
          {"source": "app.example.com", "target": "staging.example.com"}
        ],
        "parameters": [
          {"name": "username", "value": "testuser@example.com"}
        ]
      },
      "emailFailures": true
    }
  },
  "response": {
    "status": 200,
    "body": {
      "executionId": 5501
    }
  }
}