Heartbeat

Heartbeat messages will be sent every 5 seconds and they can be used to make sure that your connection is still alive. Note: Heartbeat messages are without Body (only Header)

XML

<Message>
  <Header>
    <Type>32</Type>
    <MsgGuid>ef3a5979-46ef-4f94-ae60-90c063ab3440</MsgGuid>
    <ServerTimestamp>1516013721</ServerTimestamp>
  </Header>
</Message>

JSON

{
   "Message": {
      "Header": {
         "Type": "32",
         "MsgGuid": "ef3a5979-46ef-4f94-ae60-90c063ab3440",
         "ServerTimestamp": "1516013721"
      }
   }
}