{
    "title": "order object in history collection",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "javaType": "com.sos.joc.model.monitoring.notification.common.AcknowledgementItem",
    "type": "object",
    "required": [
        "account",
        "created"
    ],
    "properties": {
        "account": {
            "type": "string"
        },
        "comment": {
            "type": "string"
        },
        "created": {
            "description": "Value is UTC timestamp in ISO 8601 YYYY-MM-DDThh:mm:ss.sZ or empty",
            "type": "string",
            "format": "date-time"
        }
    }
}