/usr/lib/x86_64-linux-gnu/libmamacpp.so is in libmama-dev 2.2.2.1-11ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libmamacpp.so.0.0.0
/usr/lib/x86_64-linux-gnu/libmamacpp.so.0.0.0