To connect SignalR socket via Postman, here is the necessary message to send socket (Don't forget to copy last space (' ')) --> "{"protocol":"json","version":1}�"

To send message SignalR socket via Postman, here is the necessary json (Don't forget to copy last space (' ')) --> "{"arguments":["Test message"],"invocationId":"0","target":"SendMessage","type":1}�"