Type of action
Indicates that an emoji reaction was placed on a message. This value is the string representation of the emoji. For example: "\u{2764}\u{FE0F}"
The ID of the MT message that this reaction is associated with.
Optionalreaction_If present, represents the grouping of emojis. Example values: "smile", "angry", "sad", "wow", "love", "like", "dislike", "other"
Object reflecting an event that is created when a contact reacts/unreacts with an emoji to a particular MT message. Currently, this is only supported for the Messenger and Instagram channels. See Reaction Event for more details.