/usr/lib/x86_64-linux-gnu/libjson-glib-1.0.so is in libjson-glib-dev 1.1.2-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libjson-glib-1.0.so.0.102.0
/usr/lib/x86_64-linux-gnu/libjson-glib-1.0.so.0.102.0