/etc/xdg/autostart/gnome-software-service.desktop is in gnome-software 3.22.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | [Desktop Entry]
Type=Application
Name=GNOME Software
Exec=/usr/bin/gnome-software --gapplication-service
OnlyShowIn=GNOME;Unity;
NoDisplay=true
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