Not able to successfully send rest api post request to generate BI publisher report in Fusion Cloud

Summary:

I'm trying to make a post-call to generate a BI publisher report. The fusion cloud rest api is returning RequestId -1 despite the request was fulfilled with 201.

Here's the payload I'm trying to send.

Endpoint is fscmRestApi/resources/11.13.18.05/erpintegrations

{    "OperationName": "submitESSJobRequest",    "JobPackageName": "/Custom/Integration/ITEM_DETAILS_REPORT",    "JobDefName": "ITEM_DETAILS_REPORT"    //   "ESSParameters":"#NULL"}

Can somebody help me, how I should be making this work? Thank you

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