Aurora uses Seed2 DFM but the json file is not going to be that drastically different 
You can still use seed as the SOM and the familiar D0 - D31 names.
For example, it looks like the “time” knob uses A0 which should mean ADC0. So you should be able to use 15 (Seed2 DFM pinout) in your json for that.
If this is your first time creating custom json, here’s a quick guide: Quick Guide on Setting Up a Custom JSON File for pd2dsy & Oopsy!
That example patch and json should work with Aurora’s “time” knob.
Would love to know how this goes!