anybody can help me rip subtitles from icflix.com ?

i know how to get the links for the free series and movies but i want a way to rip them without premium.
for example this free episode has subtitles
its subtitles link is
for premium shows i can get the episode url and i can replace the red part for the subtitle link but how to figure out the bold black part of the link? this is what i want, can anyone help me with that?

basically i want to rip subtitles of episodes which are available for premium users, i think its possible once we figure out from where the bold black part came from, i hope someone can help me.