// subscribe request
{
    "command": "subscribe",
    "identifier": "{\"channel\":\"UserTradesChannel\",\"market\":\"ETH-BTC\"}"
}

// confirmation
{
    "type": "confirm_subscription",
    "identifier": "{\"channel\":\"UserTradesChannel\",\"market\":\"ETH-BTC\"}"
}

// response structure
{
    "identifier": "{\"channel\":\"UserTradesChannel\",\"market\":\"ETH-BTC\"}",
    "message": {
        "trade": {
            "id": "d40d9f77-dbf3-4ffe-ba97-65eeacc8ebc7",
            "price": "0.02394",
            "size": "0.3",
            "market_name": "LTC-BTC",
            "order_id": "72828f0b-5796-484d-af1e-915a2495bb65",
            "fee": "0.0",
            "liquidity": "M",
            "created_at": "2018-04-24T13:46:05.121966Z",
            "order_type": "buy",
            "volume": "0.3",
            "left_currency_code": "LTC",
            "right_currency_code": "BTC"
        }
    }
}