Marks all messages in a chat as read (sends blue double-check). This also clears the unread counter on the sender’s device.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
The WhatsApp instance UUID
"a1b2c3d4-e5f6-7890-abcd-ef1234567890"
Chat ID (e.g., [email protected])
Chat marked as read
Operation succeeded
true