How to join multiple parts of one data container

Hi all,
I have big data container (more than 4K) with all debian repository, as
this:
<pre>
{
  "debian_10": {
    "debian": {
      "Components": "main contrib non-free",
      "Suites": [
        "buster",
        "buster-backports"
      ],
      "URIs": "http://deb.debian.org/debian"
    },
    "debian-security": {
      "Components": "main contrib non-free",
      "Suites": [
...
</pre>

I want shorting this data to server, this is running perfect:
"myrepos" data => '[ repos[debian_12] ,  repos[debian_11] ]';

But when i need more specific repository
"myrepos" data => '[ repos[debian_10][debian] ,
 repos[debian_10][debian-security] ]'
I get this error:
error: Error parsing JSON expression '[debian] ,
 repos[debian_10][debian-security] ]': Unable to parse json data as array,
did not start with '['

How can I access the second levels of the data container and serialize them?

Thanks.
Michal Svamberg

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