Compact high level message signing implementation.
It has high influence by django's cryptographic library and json web signature/encryption but with focus on have a compact representation. It's build on top of fantastic ptaoussanis/nippy serialization library.
This singing implementation is not very efficient with small messages, but is very space efficient with big messages.
The purpose of this implementation is for secure message transfer, it is not really good candidate for auth token because of not good space efficiency for small messages.