Post data encoding itself

[Alo Yommist <aloyommy () gmail com>]

I'm trying to post this

memberUsername=<USER>&memberPassword=<PASS>&sponsorID=S999-1907849208&visitorID=1907849208&cpSessionID=6b7e1ac2-7436-4c0f-b3b1-e7777dd33876&callbackmethod=jQuery191014485234646236567_1375786963488&_=1375786963490

to a server by sending this POST request

208.83.241.14:443 l POST
/Community/CommunityService.svc/JSON/AuthenticateMemberCP?authorization=TGFuZGluZ1BhZ2VfVXNlcjpecUFQeS1iNWc1Zm96QDNh&communityNameOrID=105
HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; Nmap Scripting Engine;
http://nmap.org/book/nse.html)
Connection: close
Content-Length: 227
Content-Type: application/json
Host: host

memberUsername=user&memberPassword=password&sponsorID=S999-1907849208&visitorID=1907849208&cpSessionID=6b7e1ac2-7436-4c0f-b3b1-e7777dd33876&callbackmethod=jQuery191014485234646236567_1375786963488&_=1375786963490

But I kept on getting an encoded version of my postdata

sponsorID=S999%2d1907849208&memberPassword=password&_=1375786963490&memberUsername=username&visitorID=1907849208&callbackmethod=jQuery191014485234646236567_1375786963488&cpSessionID=6b7e1ac2%2d7436%2d4c0f%2db3b1%2de7777dd33876

How am I to solve this? my code is attached as well.
Cheers
Yomist

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