curl -X POST --location "https://example.com/wp-json/wc/store/v1/cart/update-item" \ -u consumer_key:consumer_secret \ -H "Accept: application/json" \ -H "nonce: deadbeef" \ -H "Content-Type: application/json" \ -d '{ "key": "e3ead8396bb9598bf7092a1e78446b9f", "quantity": 2 }'