Finding JSON label in as3

Hey I am having trouble finding the Label name of a json file for example:

my JSON file

[as]

{
“payload”:[
{
“label_id”:“1”,
“example2”:“1”,
“lang_code”:“en”,
“example3”:“en”,
“example4”:“My label 1”,
“example5”:“My label 1”
}
]
}

[/as]

I can’t seem to be able to pull the labels like “label_id” “example2” “lang_code” etc. does anyone know how to retrieve these?

Thanks