{
    "description": "Notify temperature changes of Building001",
    "subject": {
        "entities": [
            {
                "idPattern": "urn:ngsi-ld:Room:001.*",
                "type": "Room"
            }
        ],
        "condition": {
            "attrs": [
                "temperature"
            ]
        }
    },
    "notification": {
        "http": {
            "url": "http://hostpc:3000/subscription/temperature-change"
        }
    }
}