The List Execute message type is used by institutions to instruct the broker to begin execution of a previously submitted
list. This message may or may not be used, as it may be mirroring a phone conversation.
Component Block - <StandardHeader>
|MsgType = L
|Must be unique, by customer, for the day
|Used with BidType=Disclosed to provide the sell side the ability to determine the direction of the trade to execute.
|Time this order request was initiated/released by the trader or trading system.
|Must be set if EncodedText field is specified and must immediately precede it.
|Encoded (non-ASCII characters) representation of the Text field in the encoded format specified via the MessageEncoding field.
Component Block - <StandardTrailer>