/usr/share/doc/libjsoncpp-dev/changelog.Debian.gz is in libjsoncpp-dev 1.7.4-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libjsoncpp-dev/../libjsoncpp1/changelog.Debian.gz
/usr/share/doc/libjsoncpp-dev/../libjsoncpp1/changelog.Debian.gz