curl --request PUT \
  --url https://api.example.com/api/settings/reviewers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "reviewer_ids": [
    123
  ]
}
'

{
  "reviewers": [
    {
      "id": 123,
      "email": "<string>",
      "name": "<string>",
      "roles": []
    }
  ]
}