In the documentation its mentioned that the client does de-duplication of identical events and that it does this by holding the 2nd and any further identical events over a 60 second period and increments the count. Theres no mention that I could find on how a custom client would pass this count on to the server.

Is it just a field in the JSON, or a header and if so are you able to provide some details so I could implement it on my custom client.

Also, for usage stats, you send a message with a type of "Usage" but where do you put the usage name ? I have tried in the message and in a tag but all entries seem to be bundled together.