curl --location --request PUT 'https://demo.myshopify.com//admin/api//products//images/.json'
{
"image": {
"id": 850703190,
"product_id": 632910392,
"position": 2,
"created_at": "2023-01-03T12:21:36-05:00",
"updated_at": "2023-01-03T12:38:53-05:00",
"alt": "new alt tag content",
"width": 123,
"height": 456,
"src": "https://cdn.shopify.com/s/files/1/0005/4838/0009/products/ipod-nano.png?v=1672767533",
"variant_ids": [],
"admin_graphql_api_id": "gid://shopify/ProductImage/850703190"
}
}