{
  "ignition": { "version": "2.2.0" },
  "systemd": {
    "units": [{
      "name": "example.service",
      "enabled": true,
      "contents": "[Service]\nType=oneshot\nExecStart=/usr/bin/echo Hello World\n\n[Install]\nWantedBy=multi-user.target"
    }]
  }
}
