A subscriber issues a UNSUBSCRIBE message to a publisher indicating it is no
longer interested in receiving media for the specified track and requesting that
the publisher stop sending Objects as soon as possible.
The format of UNSUBSCRIBE is as follows:
UNSUBSCRIBE Message {
Type (i) = 0xA,
Length (i),
Request ID (i)
}
-
Request ID: The Request ID of the subscription that is being terminated. See Section 8.7.