{
    "type": "object",
    "properties": {
        "historyId": {
            "type": "string"
        },
        "id": {
            "type": "string"
        },
        "internalDate": {
            "type": "string"
        },
        "labelIds": {
            "type": "array",
            "items": {
                "type": "string"
            }
        },
        "sizeEstimate": {
            "type": "integer"
        },
        "snippet": {
            "type": "string"
        },
        "threadId": {
            "type": "string"
        }
    },
    "version": 2
}