问云通信IM，调用创建群组API返回错误码60008？

如题，在调用 https://console.tim.qq.com/v4/im_open_login_svc/create_group 此API时，返回码提示60008，返回信息如下：

{"ErrorInfo":"service timeout or request format error,please check and try again","ErrorCode":60008,"ActionStatus":"FAIL"}

附上请求包体内容 {"Type":"AVChatRoom","Owner_Account":"73","Name":"Group_1"}