ersed positional parameters (23-42)
    send(socket, `
        {"jsonrpc": "2.0", "method": "subtract", "params": [23, 42], "id": 2}
    `);
    // Call subtract with named parameters in reverse order
    send(socket, `
        {"jsonrpc": "2.0", "method": "subtract", "params": {"subtrahend": 23, "minuend": 42}, "id": 3}
    `);
    // Call subtract with named parameters in correct order
    send(socket, `
        {"jsonrpc": "2.0", "method": "subtract", "params": {"minuend": 42, "subtrahend": 23}, "id": 4}