{
    "1": {
        "method": "changeColumn",
        "params": [
            "core_saved_charts",
            "chart_timescale",
            {
                "name": "chart_timescale",
                "type": "ENUM",
                "length": null,
                "decimals": null,
                "values": [
                    "hourly",
                    "daily",
                    "weekly",
                    "monthly",
                    "none"
                ],
                "allow_null": true,
                "default": null,
                "comment": "",
                "unsigned": false,
                "auto_increment": false
            }
        ]
    }
}