/usr/ is in libqjson-dev 0.8.1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/qjson/
/usr/include/qjson/parser.h
/usr/include/qjson/serializerrunnable.h
/usr/include/qjson/serializer.h
/usr/include/qjson/qobjecthelper.h
/usr/include/qjson/parserrunnable.h
/usr/include/qjson/qjson_export.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/qjson/
/usr/lib/x86_64-linux-gnu/cmake/qjson/QJSONConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/qjson/QJSONConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/qjson/QJSONTargets-relwithdebinfo.cmake
/usr/lib/x86_64-linux-gnu/cmake/qjson/QJSONTargets.cmake
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/QJson.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libqjson-dev/
/usr/share/doc/libqjson-dev/copyright
/usr/lib/x86_64-linux-gnu/libqjson.so
/usr/share/doc/libqjson-dev/changelog.Debian.gz