Get MRSS by entry id XML will return as an escaped string
nullobject responseProfile:object:KalturaBaseResponseProfile
abstractobjectType:string Enum: KalturaDetachedResponseProfile, KalturaResponseProfileHolder, KalturaResponseProfileKalturaBaseResponseProfile must also match any of:
object:KalturaDetachedResponseProfile object:KalturaResponseProfileHolder object:KalturaResponseProfile
nullobject entryId*:string extendingItemsArray:array[object:KalturaExtendingItemMrssParameter] object:KalturaExtendingItemMrssParameter extensionMode:integer Enum: APPEND [1], REPLACE [2]Enum Type:
KalturaMrssExtensionModeMode of extension - append to MRSS or replace the xpath content.
identifier:object:KalturaObjectIdentifier xpath:string XPath for the extending item
features:string