{
    "1": {
        "method": "changeIndex",
        "params": [
            "core_sessions",
            "login_type",
            {
                "type": "key",
                "name": "login_type",
                "columns": [
                    "login_type",
                    "running_time",
                    "member_id",
                    "member_group"
                ],
                "length": [
                    null,
                    null,
                    null,
                    null
                ]
            }
        ]
    }
}