curl --request PUT \
  --url https://east.sandbox.spade.com/counterparty-category-personalizations \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '{
  "counterpartyId": "d730906b-f1a8-49f1-9939-f27390170a6d",
  "categoryId": "011-000-000-000"
}'

{
  "counterpartyId": "d730906b-f1a8-49f1-9939-f27390170a6d",
  "categoryId": "011-000-000-000"
}