let client = new signalR.client('
https://api.crex24.com/signalr', ['publicCryptoHub']);
client.on( 'connection', (msg) =>{
client.connection.hub.invoke('publicCryptoHub', "joinOrderBook", "ETH-BTC");
client.connection.hub.on('publicCryptoHub', 'initSource', (message) => {
console.log('receive:', message)
})
});
client.start();