Length of the entity in UTF-16 code units.

Offset in UTF-16 code units to the start of the entity.

Type of the entity. Can be mention (@username), hashtag, bot_command, url, email, bold (bold text), italic (italic text), code (monowidth string), pre (monowidth block), text_link (for clickable text URLs), text_mention (for users without usernames).

For “text_link” only, url that will be opened after user taps on the text.

For “text_mention” only, the mentioned user.