/usr/share/dbus-1/services/org.mate.Engrampa.service is in engrampa-common 1.20.0-1.
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=org.mate.Engrampa
Exec=/usr/lib/engrampa/engrampa-server
|