How much urine is enough to help do a quick fish-less cycle in a 55gal aquarium?

I'd heard about doing fish-less cycling when setting up aquariums, and someone mentioned ammonia would be needed and that urine(from humans at least) is good enough. But how much for my 55 gallon freshwater. I've added no fish yet, had the tank running 24 hrs. I've got fine sand as my substrate, I've got a Fluval 405 Canister filter and a Penguin 350 Bio Wheel filter running. I've added 3 Tetra products; Easy Balance, SafeStart, and Aqua Safe. So with the SafeStart containing Bio-Spira which should speed up the bacteria growth all i need is ammonia(via urine) and it should get the bacteria growing pretty fast right? Oh, I also added a few pinches of Fish food to aid in feeding any bacteria. But again how much Urine will equal the right amount of Ammonia. Any tips or advice is appreciated.