Assumptions:
- Your json is string.
- You have an SC.Store
- Your models are defined as SC.Record instances (e.g. App.Model1)
then you can do
var json = JSON.parse(yourJsonString);
var model1 = json["Model1"];
var model2Arr = json['Model2'];
// loadRecord for a single instance
store.loadRecord(App.Model1, model1, model1.serverIdProp);
// loadRecords for a bunch of instances
store.loadRecords(App.Model2, model2Arr, model2Arr.getEach('serverIdProp'));
Note: your json should have some sort of id that the server assigns to your model instances.