/usr/lib/x86_64-linux-gnu/libbase58.so is in libbase58-dev 0.1.4-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libbase58.so.0.0.2
/usr/lib/x86_64-linux-gnu/libbase58.so.0.0.2