通过嵌套json对python中的特定键进行递归迭代

I'm trying to pull nested values from a json file. I want to print out each of the values for every "id" key. I think I'm close but can't figure out why the obj type changes from a dict to a list, and then why I'm unable to parse that list. Here is a link to the json I'm working with: I'm trying to pull nested values from a json fi