Multipart/form-data - Invalid multipart was specified error when calling API for Adobe Sign

Hello Everyone,

I am trying to apply Adobe Sign APIs using Nintex Workflow with SharePoint. Getting the BaseURI easily but when calling API for getting trasientID for document it gives "Invalid Multipart was specified" error.

Parameter for Request:

Headers: Content-Type: multipart/form-data,Authorization: Bearer XXXXXXXXXXXXXXXXXX

I want to pass File-Name and File Location in formdata of body in raw format.

I did'nt get any idea , how to pass the parameters in form-data of body using nintex web request

Please help!!

Thanks In Advance