请求地址requestUrl=https://api.mch.weixin.qq.com/v3/apply4subject/applyment

填入的MICRO_TYPE_ONLINE是文档提供的值

 返回信息为={"code":"PARAM_ERROR","detail":{"field":"/subject_info/assist_prove_info/micro_biz_type","location":"body","value":" MICRO_TYPE_ONLINE"},"message":"无法将传入参数“小微经营类型”转换为枚举类型。"}