How to split a json response into different columns with pandas?

I'm trying to split a json response in pandas into different columns, so far I have this but I don't find an effective way how to do it, I already tried several solutions but I can't separate the object correctly.

This is a sample of the data

 {
  "codeId": "fc-5599",
  "financeInfo": [
    {
      "date": "2022-01-30",
      "totalReturn": 0.022425456852
    },
    {
      "date": "2022-01-30",
      "totalReturn": 0.022425456852
    },
    {
      "date": "2022-01-30",
      "totalReturn": 0.022425456852
    },
    {
      "date": "2022-01-30",
      "totalReturn": 0.022425456852
    },
    {
      "date": "2022-01-30",
      "totalReturn": 0.022425456852
    }
  ]
}

df = pd.DataFrame(s, columns = ["codeId","financeInfo"])
df.to_csv('data_fin.csv', index=False)

I have this:

example of what I have.

example of the output I want to achieve.

Any idea of how improve this code?