Symphony Read the specified real time message / event stream ("datafeed").

_Available on Agent 2.57.0 and above._ The datafeed provides messages and events from all conversations that the user is in. The types of events surfaced in the datafeed can be found in the Real Time Events list. (see definition on top of the file) Read the specified datafeed. The ackId sent as parameter can be empty for the first call. In the response an ackId will be sent back and it can be used for the next call: in this way you acknowledge that you have received the events that came wi...