Identifier of the user that completed the task; 0 if the task isn't completed.
Point in time (Unix timestamp) when the task was completed; 0 if the task isn't completed.
Unique identifier of the task.
Text of the task; may contain only Bold, Italic, Underline, Strikethrough, Spoiler, CustomEmoji, Url, EmailAddress, Mention, Hashtag, Cashtag and PhoneNumber entities.
Describes a task in a checklist.