{
    "properties": {
        "_id": {
            "id": "id",
            "type": "string"
        },
        "lines": {
            "items": {
                "items": {
                    "type": "number"
                },
                "type": "array"
            },
            "type": "array"
        }
    },
    "required": [
        "lines",
        "id"
    ],
    "type": "object"
}