Finally I managed to get the Dictionary work. Technically, it is require only 3 simple steps:
1. To Save Dictionary in to LocalStorage just Set Item as JSON string using the "Dictionary.AsJSON" expression.
2. To Load Dictionary, first Get Item from LocalStorage using the key previously used to save Dictionary
3. Finally, check if you get the Item then Load Dictionary from JSON as string using the "LocalStorage.ItemValue" expression
That's it. After, I can simply go through each item in the dictionary one by one as I wanted and add them to list, check their number, value, text..etc Awesome
Thanks for all the help.