1{
2  "batch": [
3    {
4      "event": "Download",
5      "messageId": "I'm unique",
6      "properties": {
7        "application": "Segment Desktop",
8        "platform": "osx",
9        "version": "1.1.0"
10      },
11      "timestamp": "2015-07-10T23:00:00Z",
12      "type": "track",
13      "userId": "123456"
14    }
15  ],
16  "context": {
17    "library": {
18      "name": "analytics-go",
19      "version": "3.0.0"
20    }
21  },
22  "messageId": "I'm unique",
23  "sentAt": "2009-11-10T23:00:00Z"
24}