审核非必填参数都没有填，报错errcode":47001,"errmsg":"data format error rid: 6151d3ab-502ccdca-3c91e099"

参数如下

{
    "item_list": [
    {
        "address":"page/index/index",
            "tag":"餐饮点评与推荐",
            "first_class": "餐饮",
            "second_class": "点评与推荐",
            "first_id":null,
            "second_id":221,
            "title": "首页"
    }],
    "feedback_info": "",
        "feedback_stuff": "",
        "preview_info" : {},
    "version_desc":"测试提交审核"
}