/usr/share/man/man1/mpg123-esd.1.gz is in mpg123 1.12.1-3.2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/mpg123.bin.1.gz
/usr/share/man/man1/mpg123.bin.1.gz