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I output the scraped data in json format. Default scrapy exporter outputs list of dict in json format. Item type looks like:

[{"Product Name":"Product1", "Categories":["Clothing","Top"], "Price":"20.5", "Currency":"USD"},
{"Product Name":"Product2", "Categories":["Clothing","Top"], "Price":"21.5", "Currency":"USD"},
{"Product Name":"Product3", "Categories":["Clothing","Top"], "Price":"22.5", "Currency":"USD"},
{"Product Name":"Product4", "Categories":["Clothing","Top"], "Price":"23.5", "Currency":"USD"}, ...]

But I want to export the data in a specific format like this:

{
"Shop Name":"Shop 1",
"Location":"XXXXXXXXX",
"Contact":"XXXX-XXXXX",
"Products":
[{"Product Name":"Product1", "Categories":["Clothing","Top"], "Price":"20.5", "Currency":"USD"},
{"Product Name":"Product2", "Categories":["Clothing","Top"], "Price":"21.5", "Currency":"USD"},
{"Product Name":"Product3", "Categories":["Clothing","Top"], "Price":"22.5", "Currency":"USD"},
{"Product Name":"Product4", …