I have this weird raw JSON input :

```
{
"URL_IN": "http://localhost/",
"DownloadData": "{\"data\":[{samples:[{t:1586826385724,v:5.000e+000,l:0,s:-1,V:-1},{t:1587576460460,v:0.000e+000,l:0,s:-1,V:-1}]}]}"
}

```

And I want to access and extract the inner elements, like `t`, `v` from samples using Python.