curl --request POST \
  --url https://{subdomain}.nudj.cx/api/v2/admin/rewards/{rewardId}/process-giveaway \
  --header 'Content-Type: application/json' \
  --header 'x-api-token: <api-key>' \
  --data '{
  "winners": [
    {
      "userId": "<string>",
      "quantity": 123
    }
  ]
}'

{
  "success": true,
  "message": "<string>"
}