/usr/lib/x86_64-linux-gnu/libunity-api.so.0 is in libunity-api0 8.7+17.04.20170404-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libunity-api.so.0.1
/usr/lib/x86_64-linux-gnu/libunity-api.so.0.1