Export Import format CQM

CorreoMQTT is able to export and import messages using a JSON format:

{
  "topic": string,
  "payload": string,
  "qos": int,
  "retained": boolean,
  "dataTime": string(date),
  "messageId": string
  "messageType": INCOMING|OUTGOING
  "publishStatus": PUBLISHED|SUCCEEDED|FAILED
}

Files containing a message must have the file postfix .cqm.