Keepalive a user data stream to prevent a time out. User data streams will close after 60 minutes. It's recommended to send a ping about every 60 minutes.
Start a new user data stream. The stream will close after 60 minutes unless a keepalive is sent. If the account has an active listenKey, that listenKey will be returned and its validity will be extended for 60 minutes.
UserDataStreamsApi - interface UserDataStreamsApi