{
    "1": {
        "method": "addColumn",
        "params": [
            "core_members",
            {
                "name": "unique_hash",
                "type": "VARCHAR",
                "length": 255,
                "allow_null": true,
                "default": null,
                "values": null,
                "unsigned": false,
                "comment": "",
                "auto_increment": false
            }
        ]
    }
}