{
    "1": {
        "method": "addColumn",
        "params": [
            "nexus_purchases",
            {
                "name": "ps_pay_to",
                "type": "MEDIUMINT",
                "length": 8,
                "default": null
            }
        ]
    },
    "2": {
        "method": "addColumn",
        "params": [
            "nexus_purchases",
            {
                "name": "ps_commission",
                "type": "INT",
                "length": 2,
                "default": null
            }
        ]
    }
}