in reply to
Re^4: Getting error while decoding JSON object via POST method
in thread Getting error while decoding JSON object via POST method
Where did you try what?
I think that you are either not sending the data you think you're sending, or you're not receiving the data you think you're receiving. You have not shown working, self-contained code that exhibits the problem, so it's hard to replicate your problem or to understand what you're doing wrong.
If you want to investigate this further, I suggest printing the values you get in the request to a log file on the receiving end.