Save and load rebinds

You can serialize override properties of Bindings by serializing them as JSON strings and restoring them from these. Use SaveBindingOverridesAsJson to create these strings and LoadBindingOverridesFromJson to restore overrides from them.

// Store player rebinds in PlayerPrefs.
var rebinds = playerInput.actions.SaveBindingOverridesAsJson();
PlayerPrefs.SetString("rebinds", rebinds);

// Restore player rebinds from PlayerPrefs (removes all existing
// overrides on the actions; pass `false` for second argument
// in case you want to prevent that).
var rebinds = PlayerPrefs.GetString("rebinds");
playerInput.actions.LoadBindingOverridesFromJson(rebinds);