Social reactions
Social reactions represent user reactions to social content. They resemble Facebook reactions.
Important attributes:
- Data object - the root data object. A reaction can be attached to the data object itself, or to a comment of the data object. In any case, the data object contains the root data object, just like the comments. 
- Social comment - when not null, it contains a comment to the same Data Object to which the reaction is attached. 
- Reaction type - one of: - LIKE
- LOVE
- HAHA
- WOW
- SAD
- ANGRY
 
- Creation time Utc - automatically set by the server to the time of initial creation of the reaction.