/usr/share/dbus-1/system-services/org.debian.apt.service is in aptdaemon 0.43+bzr805-0ubuntu10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [D-BUS Service]
Name=org.debian.apt
Exec=/usr/sbin/aptd
User=root
|