How to convert json to object data Widget API

Can any one let me know how we can convert Json data like ({
"Forum":{"Roles":"","Status":"","Group":""},
"Blogs":{"Roles":"","Type":"","Group":""},
"Events":{"Roles":"","Type":""},
"TechTalks":{"Roles":"","Type":""},
"Webinars":{"Roles":"","Type":""},
"Known Issue":{"Roles":""},
"Learning Paths":{"Roles":"","Type":""},
"Licensing":{"Roles":""},
"Release Notes":{"Roles":""},
"Stack OverFlow":{"Roles":"","Type":""},
}

to object or how we can use json data in wodget api