{
    "columns": [
        {
            "name": "a",
            "type": "uuid",
            "typeSignature": {
                "rawType": "uuid",
                "arguments": []
            }
        }
    ],
    "data": [
        [
            "12151fd2-7586-11e9-8f9e-2a86e4085a59"
        ]
    ]
}