curl --request POST \
  --url https://gateway.varchev.com/crypto/cancelAllOrder \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'tenantId: <tenantid>' \
  --data '{
  "nonce": 85218272
}'

{
  "error": [],
  "result": {
    "count": 4
  }
}