{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "properties": {
        "address": {
            "type": "object",
            "properties": {
                "street": {
                    "type": "string"
                },
                "city": {
                    "type": "string"
                },
                "state": {
                    "type": "string"
                }
            },
            "required": [
                "state"
            ]
        }
    }
}