Default How do you root a s4 galaxy I9507?

I just bought a Samsung galaxy s4 I9507. It's the Australian optus version running 4.3 build number JSS15J.19507XXUENB5 and i can't seem to find anywhere how to root this model. I've come across people guessing some might work but of course I'm hesitant to try due to the risk of bricking my phone. Also does it matter between the rooting program and the android versions? Does anybody know how I can root my phone? Can anybody help me on this please?!!!