How to access serialised datatable from queue

excel

The attached image is the input data (excel). I want to upload this to queue with all rows coming under “Proposer” as a single record. i.e. for Proposer = “James Swan” i need all the rows in “RegNo.” and “Market value” to be uploaded to the queue as a single transaction.

I have a serialized data table ( using JSONConvert.SerializeObject(Datatable_Name) )
And using add queue item activity i have uploaded it to a queue.I got the whole datatable as a single Transaction. But i dont know how to access that data.
This is how it looks like.

queue

Also please suggest a better solution for my scenario.

Thank you