/usr/lib/x86_64-linux-gnu/libsonic.so is in libsonic-dev 0.2.0-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libsonic.so.0.2.0
/usr/lib/x86_64-linux-gnu/libsonic.so.0.2.0