curl --request PUT \
  --url https://staging-api.bullring.finance/v1/ramp/subaccount/{id}/banks \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "brlAccount": {
    "pixKey": "667.136.083-96"
  }
}'

{
  "id": "449eca18-9c77-472c-9e82-b08a18637759",
  "name": "Hugo Gonzalez"
}