Messages are not getting displayed on pinterest board

I am able to post pins on my pinterest board, but somehow my “note” attribute is not recieving the message and not displaying it with the image.
I have trying to resolve the issue, also my limit exceeded, but now i have waited for an hour so it is back to normal. Kindly please look into my code and guide me.

Your request is wrong.
Check the file for some hints.

Check these links.

Sir I have tried and its working in explorer api as well.
Also response is returning the message but physically not displayed at the pinterest website.
I am not able to find the mistake.
Also i removed hardcoded board id from the data