curl --request POST \
  --url https://api.unibee.dev/merchant/plan/copy \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "externalPlanId": "<string>",
  "planId": 123
}
'

{
  "code": 123,
  "data": {
    "plan": {
      "amount": 123,
      "bindingAddonIds": "<string>",
      "bindingOnetimeAddonIds": "<string>",
      "cancelAtTrialEnd": 123,
      "checkoutUrl": "<string>",
      "createTime": 123,
      "currency": "<string>",
      "description": "<string>",
      "disableAutoCharge": 123,
      "externalPlanId": "<string>",
      "extraMetricData": "<string>",
      "gasPayer": "<string>",
      "homeUrl": "<string>",
      "id": 123,
      "imageUrl": "<string>",
      "internalName": "<string>",
      "intervalCount": 123,
      "intervalUnit": "<string>",
      "merchantId": 123,
      "metadata": {},
      "metricLimits": [
        {
          "metricId": 123,
          "metricLimit": 123
        }
      ],
      "metricMeteredCharge": [
        {
          "chargeType": 123,
          "graduatedAmounts": [
            {
              "endValue": 123,
              "flatAmount": 123,
              "perAmount": 123,
              "startValue": 123
            }
          ],
          "metricId": 123,
          "standardAmount": 123,
          "standardStartValue": 123
        }
      ],
      "metricRecurringCharge": [
        {
          "chargeType": 123,
          "graduatedAmounts": [
            {
              "endValue": 123,
              "flatAmount": 123,
              "perAmount": 123,
              "startValue": 123
            }
          ],
          "metricId": 123,
          "standardAmount": 123,
          "standardStartValue": 123
        }
      ],
      "multiCurrencies": [
        {
          "amount": 123,
          "autoExchange": true,
          "currency": "<string>",
          "disable": true,
          "exchangeRate": 123
        }
      ],
      "planName": "<string>",
      "productId": 123,
      "publishStatus": 123,
      "status": 123,
      "taxPercentage": 123,
      "trialAmount": 123,
      "trialDemand": "<string>",
      "trialDurationTime": 123,
      "type": 123,
      "usVATConfig": {
        "active": true,
        "fromAddress": {
          "address": "<string>",
          "city": "<string>",
          "countryCode": "<string>",
          "state": "<string>",
          "verified": true,
          "zipCode": "<string>"
        },
        "nexusAddresses": [
          {
            "address": "<string>",
            "city": "<string>",
            "countryCode": "<string>",
            "state": "<string>",
            "verified": true,
            "zipCode": "<string>"
          }
        ],
        "sellOnUSOnly": true,
        "taxCode": "<string>",
        "toAddress": {
          "address": "<string>",
          "city": "<string>",
          "countryCode": "<string>",
          "state": "<string>",
          "verified": true,
          "zipCode": "<string>"
        }
      }
    }
  },
  "merchantId": 123,
  "message": "<string>",
  "redirect": "<string>",
  "requestId": "<string>"
}