REST Call is being generated through Postman but not in Servicenow Workflow Script

[Kunal1995]

Its a integration with third party which is working through postman but not when i execute the script through workflow , its returning 401 status code.

Sytnax in REST Message Content"-

{

    "requestId": "RITM Number",

    "callbackUrl": "urlofcallback",

    "consumerKeyword":"SIAA",

    "users": [

        {

            "legal_first_name": "kunal",

            "legal_last_name": "kumar",

            "identity_type": "S",

            "operational_manager": "mymanager"

        }

    ]

}

and below is the sytax of script in workflow:-

var shared = new sn_ws.RESTMessageV2('Integration', 'MethodName');

        shared.setStringParameterNoEscape('authToken', authToken);

        shared.setStringParameterNoEscape('requestId', requestId);

        shared.setStringParameterNoEscape('legal_first_name', first_name);

        shared.setStringParameterNoEscape('legal_last_name', last_name);

        shared.setStringParameterNoEscape('operational_manager', op521);

        shared.setStringParameterNoEscape('identity_type', identity_type);

        shared.setStringParameterNoEscape('identity_subType', identity_subtype);

        shared.setStringParameterNoEscape('consumerkeyword', consumerKeyword);

Kindly help as i am getting success code through postman.

[Kunal1995]

The auth token is being passed in http header of method