curl --request POST \
  --url https://api.example.com/admin/entity/label/save \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "languageID": 1,
  "title": "<string>",
  "entityTypeID": 42
}
'

{
  "success": true,
  "data": "<unknown>"
}