Parsing string Data-Groups with Arrays as value?

Hello, I was hoping someone can share some working examples or help point me in the right direction regarding a string data-group with an array as a value.

String Data-Group:

key = record1 and value = ["name": "value", "meta": "value", "proto": "value"]
key = record2 and value = ["name": "value", "meta": "value", "proto": "value"]
key = record3…

I need to then reference the data-group in a TCL iRule to lookup what is the value of record2.meta. Similar to objectName.property in Javascript but the property is always a string.

I was attempting to use a combination of

[class match]

or

[array]

commands to access the array data, but failed to do so.

Thanks