Reaction
- chatType: stringFormat: uuid
Id - createdType: stringFormat: date-time
At the date-time notation as defined by RFC 3339, section 5.6, for example, 2017-07-21T17:32:28Z
- messageType: stringFormat: uuid
Id - reactionType: string
- reactionType: stringFormat: uuid
Id - senderType: stringFormat: uuid
Id