{
  "input": {
    "type": "alias",
    "previousId": "previous-id",
    "userId": "user-id"
  },
  "output": {
    "old_actor": "previous-id",
    "write_key": "0e116d3930b329831f146716c3667dfe",
    "new_actor": "user-id"
  }
}