I am having a table data in string form. Sample is given below:

```
{"engName1":"HOLDER","validDurPeriod":3,"engName2":"INFORMATION","appStatus":2,"stayExpDate":"01/10/2012","engName3":"","appExpDate":"12/04/2010"}

```

How can I convert it into a proper table type variable so that I can access keys.I am new to lua and I am not aware if there is any existing method to do so.