/usr/share/doc/libsmokesopranoserver3/changelog.Debian.gz is in libsmokesopranoserver3 4:4.8.2-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libsmokesopranoserver3/../libsmokesoprano3/changelog.Debian.gz