@star_board ,
When you say customizable JSON data format, what exactly do you mean?
Each datalayer node must be provided as a fixed type. This could be a complex datatype defined as flatbuffers.
See the official documentation and the Python provider sample for reference.
The easiest route, if it makes sense in your application, would be to store the value as a JSON string. This way you could parse it on the client side as a JSON object.
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