{"jsonrpc": "2.0","method": "eth_subscribe","params": ["newFinalizedBlocks"],"id": 1}

{
    "jsonrpc": "2.0",
    "method": "eth_subscription",
    "params": {
        "subscription": "0x8fc46d59fe6fad7c474cf4105321ac70",
        "result": {
            "finalizedBlockNumber": "0x14b9c51",
            "finalizedBlockHash": "0xebbe050276be3c1644211994df64c5ee2d9895b289d34f227cb7d86ddd10a81f"
        }
    }
}