That melody is easy enough to pick out even on a virtual keyboard I found. But that's the best I can do with it at this point. It's just the same notes in a loop. Just need some simple rhythm in the base in 4.4 maybe?
The song is in E minor 4/4; I transposed it down to D minor to give it a bassier feel. But yes, except for the prechorus (and a minor variation during the chorus), it’s same riff for the entire song.
There are plenty of tabs available on the Web, should you want to go that route.