{
    "1": {
        "method": "changeColumn",
        "params": [
            "calendar_event_reviews",
            "review_votes_data",
            {
                "name": "review_votes_data",
                "type": "TEXT",
                "length": 0,
                "decimals": null,
                "values": [],
                "allow_null": true,
                "default": "",
                "comment": "JSON object containing data about who has voted helpful\/unhelpful ",
                "unsigned": false,
                "zerofill": false,
                "auto_increment": false,
                "binary": false
            }
        ]
    }
}