Application-specific data for this request. It enables the sender and
receiver to easily extend the media protocol without having to use a new
namespace with custom messages.
mediaSessionId
(number or undefined)
Id of the media session that the request applies to.
requestId
number
Id of the request, used to correlate request/response.
sequenceNumber
(number or undefined)
A number to synchronize all queue commands.
If provided for a queue command, the SDK will verify the queue latest
sequence number match the request.
Current sequenceNumber is provided as part of outgoing queue changed
messages.