{
  "key":"tester_message.created",
  "created_at":"2017-08-25T16:11:40.203Z",
  "data":{
    " comment_text”:”body message”
  },
  "uuid":"47a25dc7-e838-4de5-b49b-0d5d41510311"
}
AttributeType or Potential ValuesNote
keytester_message.created
created_atDateTime
dataHashtester_message.created activities will have one key, comment_text.
uuidUUID