Updating record with a value from a rest response

Hello, have a quick one. I’ve got a rest api running a pulling data in relation to the Account that is set by the page param.  I then want to use an action to update a row on the account. What would be the correct way of writing the variable? This is what i assumed was correct but is not: {{$Model.APIConnection.response.data.id}}

Perhaps {{$Model.APIConnection.data.0.id}} ? For all Models, you can get at the data in the first row via .data.0.