Optional actor_The chat on behalf of which the reaction was changed, if the user is anonymous
The chat containing the message the user reacted to
Date of the change in Unix time
Unique identifier of the message inside the chat
New list of reaction types that have been set by the user
Previous list of reaction types that were set by the user
Optional userThe user that changed the reaction, if the user isn't anonymous
This object represents a change of a reaction on a message performed by a user.