Hey colin-chad,
Good to hear from you, and welcome!
The JSON file is a collection of the strategies, not the EAs. The EAs are only generated when we download / export them, and each time you do, the software automatically generates a new, unique EA number.
You can however use the Validator to import an EA back into EA Studio, and then adjust the strategy if you’d like to. However, as mentioned above, once you’ve made any changes, and download / export it again, a new unique number will be assigned to the EA.
So, to answer your question, at this stage there is no link between the JSON object and the EA magic number, only the strategy ID, because the strategy only gets an EA number assigned , when it get exported as an EA.
Hope this helps clear things up.
Cheers,
Ilan