curl --request POST \
  --url https://whitebit.com/api/v4/sub-account/balances \
  --header 'Content-Type: application/json' \
  --header 'X-TXC-APIKEY: <api-key>' \
  --data '
{
  "id": "8e667b4a-0b71-4988-8af5-9474dbfaeb51",
  "ticker": "USDC"
}
'

{
  "USDC": [
    {
      "main": "42",
      "spot": "10",
      "collateral": "14"
    }
  ]
}