{
  "input": {
    "type": "alias",
    "previousId": "previous-id",
    "userId": "user-id"
  },
  "output": {
    "event": "$create_alias",
    "properties": {
      "alias": "user-id",
      "distinct_id": "previous-id",
      "token": "89f86c4aa2ce5b74cb47eb5ec95ad1f9"
    }
  }
}