688191a9_Messages___Spark__Data_Type
[Attribute] ReplyToId [Writeable] No [Required] No [Description] The message Id the current message is a response to. If null, the current message is not a reply to another message. Use the Message Replies service to create replies. [Data Type] 
Character
C h a r a c t e r
T i m e s t a m p
B o o l e a n
C h a r a c t e r L i s t
E x p a n s i o n
Messages - Spark
Data Type