curl --request POST \
  --url https://billing-api.sandbox.z2pay.com/plans/{id}/prices \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "money": {
    "amount": 1,
    "currency": "<string>"
  },
  "recurrence": {
    "interval": 1,
    "anchorDay": 16,
    "collectionTiming": "prepaid"
  },
  "planItemId": "<string>",
  "planItemKey": "<string>",
  "billingScheme": "fixed",
  "tiers": [
    {
      "upTo": 1,
      "unitAmount": 1
    }
  ],
  "packageSize": 1,
  "meterId": "<string>"
}
'