{
  "Certified Pre-Owned": {
    "year": 2023, "make": "Honda", "sale_price": 24999, "condition": "CPO",
    "features": [{ "feature_text": "Extended Warranty" }]
  }
}

A flat object - each key is a preset name, each value a snapshot of field id → value in the same shape form.json's fields describe. image and label fields are never included in a snapshot. Written by the app from Save current as new preset on Input Form - not typically hand-written.

A preset literally named "Default" (case-insensitive) auto-applies whenever the form opens fresh, if presets_enabled is on.