{
    "$schema": "https://json-schema.org/draft/2019-09/schema",
    "$id": "http://example.com/example.json",
    "type": "object",
    "required": [
        "id",
        "jsonrpc",
        "result"
    ],
    "properties": {
        "id": {
            "type": "string"
        },
        "jsonrpc": {
            "type": "string"
        },
        "result": {
            "type": "object",
            "patternProperties": {
                "^[a-zA-Z0-9_]+$": {
                    "type": "object",
                    "required": ["usd"],
                    "properties": {
                        "usd": {
                            "type": "number"
                        }
                    }
                }
            },
            "additionalProperties": false,
            "minProperties": 1
        }
    }
}