Allowed mentions for a message
Attachment objects with filename and description
The components to include with the message
The message contents (up to 2000 characters)
rich content (up to 6000 characters)
true and nonce is present, it will be checked for uniqueness in the past few minutes.
If another message was created by the same author with the same nonce, that message will be returned and no new message will be created.
Message flags combined as a bitfield
Include to make your message a reply
A nonce that can be used for optimistic message sending
IDs of up to 3 stickers in the server to send in the message
true if this is a TTS message