Sample systemd unit file

[Unit]
Description=Sonarr Daemon
After=syslog.target network.target
[Service]
User=sonarr
Group=sonarr
Type=simple
ExecStart=/usr/bin/mono /opt/sonarr/bin/NzbDrone.exe -nobrowser -data /opt/sonarr
TimeoutStopSec=20
[Install]
WantedBy=multi-user.target