AutoTools JSON Trouble

Hello, I am having trouble dumping a root json object into the value of another json file. Essentially, I am trying to turn a .json that looks something like this {key1: {}} into this {key1: root2}

I have attached json file that I read from file (renamed to .txt so that I could attach it to this post).

This is my setup:

1. JSON Read - Attached .json file (aka "root1")
Input Format: Json
Simple Mode: true
Json: path to file
Json Root Variable: testroot
Separator: ,

2. JSON Read - URL (aka "root2")
Input Format: Json
Simple Mode: true
Json: http://data.nba.net/prod/v2/20180428/scoreboard.json
Json Root Variable: todayjson
Separator: ,

3. JSON Write
Separator: ,
Update Fields: today
Update Values: %todayjson
Arrays Separator: |

I am getting an error that says "update paths and values must have the same number of values." I think the problem is that AutoTools treats root2 as multiple key/value pairs rather than one json object. Has anyone encountered this before or can think of a solution?