I've seen this thread (
https://help.zoho.com/portal/community/topic/api-question-adding-a-thread-to-an-existing-ticket) about adding a thread to an existing ticket. However, that seems to be with an old api, while the new REST api doesn't support this anymore. Is that correct, or is there a method to do this?
Also, is there a way to set the channel of a thread to anything else than e-mail? Like a custom channel?