Hi Sergio,
You can find out the issue if you put your Log to trace for the REST consume.
The option is in the console> Advanced> Set Log Leves> Rest Consume> Trace.
This way, you will be able to know the exact reason for the error,
Also can you pls attach the log for the error, that you are getting, it will help us to understand what exactly is wrong with the Rest of call.
Things you can check:
-> are you passing the correct headers?
-> Is the authentication correct?
-> Is the payload correct?
Let me know, if you have any issues,
Hope it helps!
On a highlevel from the screenshot, the attribute name in SeriaNumberItem seems to be wrong. As per you JSON it is supposed to be "serial" while you have "Serial" in the domain model. Check that.
that could be the issue