curl --request POST \
  --url https://whitebit.com/api/v4/main-account/smart/investment/close \
  --header 'Content-Type: application/json' \
  --header 'X-TXC-APIKEY: <api-key>' \
  --data '
{
  "id": "0d7b66ff-1909-4938-ab7a-d16d9a64dcd5",
  "request": "{{request}}",
  "nonce": "{{nonce}}"
}
'

{}