List Cancel Request

TagField NameReq'dComments
  Standard Header Y MsgType = K
66 ListID Y
60 TransactTime Y Time this order request was initiated/released by the trader or trading system.
229 TradeOriginationDate N
58 Text N
354 EncodedTextLen N Must be set if EncodedText field is specified and must immediately precede it.
355 EncodedText N Encoded (non-ASCII characters) representation of the Text field in the encoded format specified via the MessageEncoding field.
  Standard Trailer Y