Task: Convert JSON to an Excel file

n8n workflow:
{"nodes":[{"name":"Webhook","type":"n8n-nodes-base.webhook","position":[340,0],"webhookId":"c1616754-4dec-4b00-a8b5-d1cb5f75bf11","parameters":{"path":"c1616754-4dec-4b00-a8b5-d1cb5f75bf11","options":{},"httpMethod":"POST","responseMode":"responseNode"},"typeVersion":1},{"name":"Item Lists","type":"n8n-nodes-base.itemLists","position":[560,0],"parameters":{"options":{},"fieldToSplitOut":"=body"},"typeVersion":1},{"name":"Spreadsheet File","type":"n8n-nodes-base.spreadsheetFile","position":[780,0],"parameters":{"options":{},"operation":"toFile","fileFormat":"xlsx"},"typeVersion":1},{"name":"Respond to Webhook","type":"n8n-nodes-base.respondToWebhook","position":[1020,0],"parameters":{"options":{"responseHeaders":{"entries":[{"name":"content-disposition","value":"=attachment; filename=\"{{$node[\"Webhook\"].json[\"query\"][\"filename\"]? $node[\"Webhook\"].json[\"query\"][\"filename\"] : \"Export\"}}.xlsx\""}]}},"respondWith":"binary"},"typeVersion":1}],"connections":{"Webhook":{"main":[[{"node":"Item Lists","type":"main","index":0}]]},"Item Lists":{"main":[[{"node":"Spreadsheet File","type":"main","index":0}]]},"Spreadsheet File":{"main":[[{"node":"Respond to Webhook","type":"main","index":0}]]}}}