Invalid Parameter : Custom Endpoint

I am new to sugarCRM
I had created a custom module(source IP) called order and its working fine. And I had created a custom API for the order module and I exposed that endpoint to different application in different server. The API was tested using Postman and was working fine. Whenever application (destination ip) hits order API in sugarCRM.,SugarCRM is throwing invalid parameter(error code 422) .
Below is the response
{"error":"invalid_parameter","error_message":"A parameter in your request was invalid." }
Version used is 10.3 (Enterprise)

How to solve this problem ?