Rest Service Integration with UiPath

Hi Decisions Team,

I am trying to execute a Post Method API call to UiPath Orchestrator. But I am getting the error - "queueItemParameters must not be null" though all the parameter values are provided.

I have attached text file with the input and output of the Rest API step after debugging and screenshot of the API method.

Please check what is missing or wrong in the method and provide your update.
Thanks for your time.

Regards,
Ankit