curl --request PATCH \
  --url https://api.jtl-cloud.com/erp/v1/items/{itemId}/suppliers/{supplierId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --header 'x-appid: <x-appid>' \
  --header 'x-appversion: <x-appversion>' \
  --header 'x-tenant-id: <x-tenant-id>' \
  --data '
{
  "Sku": "<string>",
  "ItemName": "<string>",
  "IsStandard": true,
  "PurchasePriceNet": 123,
  "TaxRate": 123,
  "MinimumPurchaseQuantity": 123,
  "PermissibleOrderQuantity": 123,
  "DeliveryTime": 123,
  "UseSupplierDeliveryTime": true,
  "Stocklevel": 123,
  "IsDropshipping": true,
  "MergeStockLevel": true,
  "Comment": "<string>",
  "PackagingUnit": "<string>",
  "AmountPackagingUnit": 123,
  "ScalePrices": [
    {
      "FromQuantity": 123,
      "PurchasePriceNet": 123,
      "ReduceStandardPriceByPercent": 123
    }
  ]
}
'

{
  "ErrorCode": "<string>",
  "ValidationErrors": {},
  "Errors": {},
  "ErrorMessage": "<string>",
  "Stacktrace": "<string>"
}