Hi guys, thanks for yor help, finally i have found the solution. The problem is my jason contains tab character. So what i have to do is just clear any additional character like newline or tab from:
"{ \"topic\": \"room:marketplace_disbursement_service\", \"event\": \"inquiry_response\", \"payload\": {}, \"ref\": 0 }"
to this one:
"{\"topic\":\"room:marketplace_disbursement_service\",\"event\":\"inquiry_response\",\"ref\":0}"
and it works , thanks guys for helping me that the problem is jason
