curl --request POST \
  --url https://api.orderly.org/v1/referral/multi_level/claim_code \
  --header 'Content-Type: application/json' \
  --header 'orderly-account-id: <orderly-account-id>' \
  --header 'orderly-key: <orderly-key>' \
  --header 'orderly-signature: <orderly-signature>' \
  --header 'orderly-timestamp: <orderly-timestamp>' \
  --data '
{
  "referee_rebate_rate": 123
}
'

{
  "success": true,
  "timestamp": 1702989203989,
  "data": {
    "referral_code": "mycode",
    "default_referee_rebate_rate": 0.1
  }
}