In the project I was working on, we did it for sure (at least part of the description). Animation data is passed to JSON and parsed and interpreted. It displays the many basic animation features provided by Core Animation - mainly position and frame animations.
Unfortunately, we developed it patented, and it is very doubtful that the company would want to publish it as an open source.
In the end, my answer to your question is that there are no frameworks that currently support this, but it will not be too difficult to implement it yourself. Then, by creating a tool that your designers can use to create animations, JSON will be the next logical step. If the tool were not WYSIWYG, but was just a little pseudo-project tool, then it would probably be not so difficult to create.
Good luck and best wishes.
Matt long
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