Key should be surrounded by double quotes.

[LPecht]

nice job !!

any way to change key from single to double quotes?

{"simple_key": "Just a string", "values": [{"id": 100, "name": "Item 1"}, {"id": 150, "name": "Item 2"}]}

https://stackoverflow.com/questions/949449/do-the-json-keys-have-to-be-surrounded-by-quotes