curl --request POST \
  --url https://api.affinity.co/v2/lists/{listId}/fields/{fieldId}/dropdown-options \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "type": "dropdown",
  "text": "Seed"
}
'

{
  "type": "dropdown",
  "id": 4,
  "text": "Seed"
}