/usr/share/nemo/actions/add-desklets.nemo_action is in nemo-data 2.2.4-2.
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 7 8 9 10 11 12 13 14 15 16 17 | [Nemo Action]
Name=Add Desklets
Comment=Add Desklets
Exec=cinnamon-settings desklets
Selection=None
Extensions=any;
Icon-Name=cs-desklets
Dependencies=cinnamon-settings;
Conditions=desktop;dbus org.Cinnamon;
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