curl --request POST \
  --url https://futures.kraken.com/derivatives/api/v3/cancelorder \
  --header 'APIKey: <api-key>' \
  --header 'Authent: <api-key>'

{
  "result": "success",
  "cancelStatus": {
    "status": "cancelled",
    "order_id": "cb4e34f6-4eb3-4d4b-9724-4c3035b99d47",
    "receivedTime": "2020-07-22T13:26:20.806Z",
    "orderEvents": [
      {
        "type": "CANCEL",
        "uid": "cb4e34f6-4eb3-4d4b-9724-4c3035b99d47",
        "order": {
          "orderId": "cb4e34f6-4eb3-4d4b-9724-4c3035b99d47",
          "cliOrdId": "1234568",
          "type": "lmt",
          "symbol": "PF_XBTUSD",
          "side": "buy",
          "quantity": 5500,
          "filled": 0,
          "limitPrice": 8000,
          "reduceOnly": false,
          "timestamp": "2020-07-22T13:25:56.366Z",
          "lastUpdateTimestamp": "2020-07-22T13:25:56.366Z"
        }
      }
    ]
  },
  "serverTime": "2020-07-22T13:26:20.806Z"
}