The Entourage theme song is an original by Jane’s Addicition entitled Superhero.
Here are the edited lyrics from the show. They removed the first verse, and removed the middle two lines of the chorus:
Yeah, yeah
Yeah, yeah
Yeah
My mind had been enabled
In a memory you overflowed
Want to be your superheroEven if I tumble fall
I’m ok
You know I need you desperately
I want to be your superheroYeah
Oh, yeah
Oh, yeah....
my SUPERHERO :)