"Santana" will demand a lot from your legs and your stamina. 10 intervals of 400m are tough, use the 3-minute breaks between rounds for the best possible regeneration. Try to regulate your pulse, drink a small sip of water and loosen up your legs. The goal is to keep your 400m time as constant as possible over the 10 intervals.
Scaling: If the given variation is still too hard for you, scale "Santana" by reducing the intervals to 5x400m.