Sounds like a perfect job for Dancer2 and Dancer2::Plugin::REST. The process is fairly straightforward, it is almost too easy. You will have a JSON and YAML REST API up and running very quickly.

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)