cat ~/.config/autostart/Nextcloud.desktop 
[Desktop Entry]
Name=Nextcloud
GenericName=File Synchronizer
Exec=bash -c 'sleep 15 && /usr/bin/nextcloud'
Terminal=false
Icon=nextcloud
Categories=Network
Type=Application
StartupNotify=false
X-GNOME-Autostart-enabled=true
X-GNOME-Autostart-Delay=15