curl --request POST \
  --url https://whitebit.com/api/v4/collateral-account/balance \
  --header 'Content-Type: application/json' \
  --header 'X-TXC-APIKEY: <api-key>' \
  --data '
{
  "ticker": "<string>",
  "request": "<string>",
  "nonce": "<string>"
}
'

{
  "code": 123,
  "message": "<string>",
  "errors": {}
}