The user is preparing a message; typing, recording, uploading, etc. This update is valid for 6 seconds. If no further updates of this kind are received after 6 seconds, it should be considered that the user stopped doing whatever they were doing
updateUserTyping#c01e857f user_id:long action:SendMessageAction = Update;
Param added in Layer 17.
Below you will find information on schema changes. For more details on the use of layers, see Invoking API methods.