According to the proposal for the SDK Rendering API protocol

This PR adds a new field data to renderers object as discussed in the related thread

I switched to a more complex data type raw object instead of string to allow passing more datas into it.
Then all data related to the renderer SDK could be passed through this field.

Here is an example of how it could go:

{
  "name": "myRenderer",
  "version": "2.4",
  "data": {
    "uiRendereringVersion": "1.2",
    "resizable": true
  }
}