curl --request POST \
  --url https://api.unibee.dev/merchant/checkout/new_checkout \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "data": {},
  "description": "<string>",
  "name": "<string>",
  "stagingData": {}
}
'

{
  "code": 123,
  "data": {
    "merchantCheckout": {
      "createTime": 123,
      "data": {},
      "description": "<string>",
      "id": 123,
      "isDefault": true,
      "merchantId": 123,
      "name": "<string>",
      "stagingData": {},
      "updateTime": 123
    }
  },
  "merchantId": 123,
  "message": "<string>",
  "redirect": "<string>",
  "requestId": "<string>"
}