{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "array",
    "default": [],
    "items": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
            "name": {
                "type": "string",
                "default": ""
            },
            "volume": {
                "type": "number",
                "default": "30"
            },
            "createdTimestamp": {
                "type": "number",
                "default": 0
            },
            "file": {
                "type": [
                    "object",
                    "null"
                ],
                "default": null
            }
        },
        "required": [
            "name",
            "volume",
            "createdTimestamp",
            "file"
        ]
    }
}