Create and update products

{
  "products": [
    {
      "product": "product-one",
// Required. Must be a valid product path/ID: alphanumeric, all lower-case, no special characters except dash "-", must be greater than two characters in length
      "display": {
// Required at least in English
        "en": "String"                                                          
      },
      "description": {
        "summary": {
          "en": "String"
// This field also supports Markdown.
        },
        "action": {
          "en": "String"                                                        
        },
        "full": {
          "en": "String"
// This field also supports Markdown.
        }
      },
      "fulfillment": {
        "instructions":{
// Optional Post Order Instructions (e.g., for a 'thank you message' and directions on how to register the product)
          "en":"String",
// This field also supports Markdown.
          "es":"String"
// This field also supports Markdown.
        } 
      },
      "fulfillments": [ 
            { 
               "type":"file",
// Required.                                   
               "url":"http://somedomain.net/files/8675309/filename.exe"",
// Required when uploading a new fulfillment file; specify external file URL for FastSpring to retrieve 
               "display":"filename.exe",
// Required fulfillment file name; extension must match file specified in URL
               "applicability":"ALWAYS",
// Or "BASE", "CONFIGURATION", "REBILL_ONLY", "NON_REBILL_ONLY", 
               "behavior":"CURRENT"
// Or "PREFER_EXPLICIT"; 
            } 
         ], 
      "image": "http://somedomain.net/images/8675309/filename.jpg"",
// Product icon image
      "format": "digital",
// Or "physical" or "digital-and-physical"
      "sku": "string", 
      "taxcode": "DC020502",
// Optional SKU ID string
      "attributes": {
// Strings. Custom key / value attributes that will be passed back once this product is purchased (aggregate limit of approximately 4,000 characters total).
        "key1": "value1",
        "key2": "value2",
        ...
      }, 
      "pricing": {
        "trial": 2,
// Days, only needed if you are creating a subscription
        "interval": "month",
// Or "adhoc", "day", "week", "year", only needed if you are creating a subscription
        "intervalLength": 1,
// Required if "interval" is specified and is not "adhoc"
        "quantityBehavior": "allow",
// Or "lock" or "hide"
        "quantityDefault": 1,
        "price": {
          "USD": 14.95,
// Currency must be enabled in the Store Settings
          "EUR": 10.99
        },
        "setupFee": {
// Optional one-time setup fee for subscriptions; if set, this cannot be removed from the order. The amount will not be included in future rebills.
          "title":{"en":"Setup fee title"},
// Optional description of the one-time setup fee, format "language code":"string"
          "price":{"USD":10}
// Amount of the one-time setup fee, format "currency":amount
        },
        "quantityDiscounts": {
// "Volume Discounts". Support percentage or "amount off". Mixed values are not supported. 
          10: 25.00,
// Quantity: percentage off. Everything more than 10 units will be discounted by 25%.
          30: {"USD": 25.00, "EUR": 15}
// Quantity: amount off in each supported currency. This value will be subtracted from the product price.
        },
        "discountReason": {
          "en": "The Reason"
        },
        "discountDuration": 1,
        "dateLimitsEnabled": true,
// Pass "true" if you want to limit product discount availability by date range (for subscriptions, this only applies to the initial order).
        "dateLimits": {
          "start": "2020-06-05 12:00",
// Beginning date for the discount availability. YYYY-MM-DD 00:00 GMT, or pass the date in milliseconds.
          "end": "2020-07-04 19:33"
// Expiration date for the discount. YYYY-MM-DD 00:00 GMT, or pass the date in milliseconds.
        }
      }
    },
    {
      ...next product definition...
    }
  ]
}

{
  "errors": [
    {
      "product": "product-id",
      "error": {
        "product": "product is required",
// "product" is required when creating a new product
        "display": "display is required",
// "display" is required when creating a new product
        "interval": "intervalLength must be specified",
// "intervalLength" is required if "interval" is specified
        "intervalLength": "interval must be specified",
// "interval" is required if "intervalLength" is specified
        "renew": "interval must be specified",
// or "intervalLength must be specified" or "interval and intervalLength must be specified"
        "trial": "interval must be specified",
// or "intervalLength must be specified" or "interval and intervalLength must be specified"
        "discountDuration": "interval must be specified",
// or "intervalLength must be specified" or "interval and intervalLength must be specified"
        "discountDuration": "quantityDiscounts must be specified",
        "discountReason": "quantityDiscounts must be specified"
      }
    }
  ]
}