I dont think so…
the preset definition is here
https://docs.electra.one/developers/presetformat.html#preset-json-format
the instrument definition is very similar… basically with sections missing
I looked at the eif for toraiz to figure it out, then I created a (primitive) preset to instrument converter
https://forum.electra.one/t/preset-to-instrument-python-script
the converter cant be 100% as there is not a 1-1 mapping, but I found it useful for giving me 90% of what I needed, and from there i edited it by hand.