Update Record API does not work

Update Record API does not work

I follow the steps described @ https://www.zoho.com/people/help/api/update-record-api.html, and get the result of " 抱歉，您不能访问该数据，请联系管理员。 "。

URL:

https://people.zoho.com/people/api/forms/json/employee/updateRecord?authtoken=xxxxxxxxx

POST:

recordId=xxxxxxxxxx

inputData={"First Name": ""}

Any suggestions?

Thanks.