this is the actual request being sent with some signatures changed etc ...
POST //api_v3/index.php?service=media&action=list&undefined HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Content-Length: 349
Host: www.kaltura.com
Connection: close
format=1&apiVersion=3.3.0&clientTag=node%315-10-2&filter:objectType=KalturaMediaEntryFilter&filter:referenceIdEqual=3142&pager:objectType=KalturaFilterPager&ks=djJ8MTc3NjI2MXwNOWkC9FHKp_c63YyqBvLbk8CuRDu9MtR16i1titOBkP2WUSgi42xj00EX84_uqZIJNX-uKiQ_yTN3khSis5PQtVWYCXtEjGFBE1JsPJ0dB2A%3D&kalsig=d080dd2a477493e38be72f76509a