1.2. Mandatory Tags and Headers

Two mandatory tags should be present in JSON payload:

· identity/fn or fn: unique identifier of the device by token,

· msgID (except for activation): unique identifier for each request. It is useful in case if there was a connection problem and the response was processed on the server but not received.

Also, an X-Signature header should be passed along with the JSON, which is needed for the signature verification.