I previously asked a question about the Pre-fill Tools fields and how to populate them using docusign. I got this working but I misunderstood the use case for them, they dont fit my requirement. 

I have a form with a number of standard fields and I would like to fill them before sending to the signer. 
I have been able to use the ‘Get recipient tabs from envelope’ to get a list of all my fields 

e.g. I have a standard field in the form called OrgName. 
Here I am using the action ‘Get recipient tabs from envelope’

           {
                "tabType": "text",
                "value": "",
                "tabLabel": "OrgName",
                "documentId": "1",
                "tabId": "6367e668-ac81-462f-862b-26d204458056",
                "recipientId": "1"
            },

I would like to populate this with text in power automate before sending the envelope. 
Is this possible?