The latest Beta should work with this JSON call. I tested it out and here is file using only the JSON call and plotting the data.
It would be great if you could try it out again and see if it works now.
For anyone interested, the JSON call allows you to have the data refreshed every time you open the file, or click the refresh button on the object. The data is not saved in the file at all.
If you want a saved version of the data, you will need to make a copy (For example, use Edit/Copy as Text) to have the data itself saved in the file.
This is only in the beta for now but anyone with a licenses can download and use the beta version.