{
  "input": {
    "previousId": "previous-id",
    "type": "alias",
    "userId": "user-id",
    "timestamp": "2014"
  },
  "output": {
    "_k": "2b93bdf937c54fc7da2b5c6015c273bf3919c273",
    "_p": "previous-id",
    "_n": "user-id"
  }
}