{

            "$schema": "http://json-schema.org/draft-04/schema#",
            "type": "object",
            "properties": {
                "sensorId": {
                    "type": "string"
                },
                "temperature": {
                    "type": "object",
                    "properties": {
                        "old": {
                            "type": "number"
                        },
                        "new": {
                            "type": "number"
                        }
                    }
                }
            }
        
    }