{
  "listen_port": 8088,

  "api_base": "https://signage.example.com",
  "api_token": "st_REPLACE_WITH_A_FULL_SCOPE_TOKEN",
  "overlay_base_url": "https://signage.example.com/incident-overlay.html",
  "device_id": "DEVICE_OR_GROUP_ID",

  "position": "top-right",
  "source_label": "Monitoring",

  "shared_secret": null,

  "overlay": { "width": 760, "height": 280, "border_radius": 16, "opacity": 1 }
}