微信客服添加接待员kf/servicer/add接口总是错误?

报错:errcode":40058,"errmsg":"Warning: wrong json formatuserid_list count 0, required at least 1. Invalid input invalid Request Parameter, hint: [1633360707_224_219bc35de178737ad36673587439018a], from ip: , more info at https://open.work.weixin.qq.com/devtool/query?e=40058","result_list":[]}

userid_list改了很多种了还是不行,客服id不知道是哪个,两个都试了也不行