javascript - Why can’t I access data sent via socket.io by key in node.js?

Question

I'm sending some data from my web page using socket.io and then handling it in the node.js back end.

The code I use to send my data is:

var joystick1 = new VirtualJoystick({
        container   : document.body,
        strokeStyle : 'cyan'
    });
    setInterval(function(){
                var outputEl    = document.getElementById('resulty');
                outputEl.innerHTML  = joystick1.deltaY();

                //THE DATA IS SENT HERE
                socket.emit('key', {Speed: joystick1.deltaY()});

            }, 1/30 * 1000);
    joystick1.addEventListener('touchStartValidation', function(event){
        var touch   = event.changedTouches[0];
        if( touch.pageX >= window.innerWidth/2 )    return false;
        return true
    });

I handle it in node.js using this code:

socket.on('key', KeyReceived);  //Key received from client

function KeyReceived(data)
{
    //DATA IS PRINTED HERE
    console.log(data);

    switch(data.Key)
    {
    case "Steering":
        _direction = 90 + data.value;
    console.log(_direction);
        break;
    case "Speed":
        _speed = 90 + data.value;
    console.log(_speed);
        break;
    case "Adjustment":
        _adjustment = data.value;
        break;
    }
}

In the console this prints out my data, but for some reason it won’t go into my case statements because my keys don't match?

What do I need to change to make this work?