curl --request POST \
  --url https://www.aionmarket.com/bvapi/markets/orders/cancel-all \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "walletAddress": "<string>",
  "marketIds": [
    "<string>"
  ]
}
'

{
  "cancelledCount": 123
}