/usr/lib/x86_64-linux-gnu/libcgmanager.so is in libcgmanager-dev 0.24-0ubuntu5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libcgmanager.so.0.0.0
/lib/x86_64-linux-gnu/libcgmanager.so.0.0.0