/usr/share/dbus-1/services/io.github.GnomeMpv.service is in gnome-mpv 0.13-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [D-BUS Service]
Name=io.github.GnomeMpv
Exec=/usr/bin/gnome-mpv --gapplication-service
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