LLD extract embedded dicts from json

[aeromaks]

Hi folks,
I'm trying to create template to monitor some metrics of docker swarm services/tasks.
I've created a python script and LLD template. The script runs on docker swarm node and generates next json structure

{
"service_name": "portainer_agent",
  "tasks": [
    {
     "task_id": "cje2yvfy6hmvxm41dduwzclcm",
     "image_tag": "latest"
   },
   {
     "task_id": "l7nzsod5k9goullaetlquppm9",
     "image_tag": "latest"
   },
   {
     "task_id": "to6udk3hjf7061ohfmeebuxww",
     "image_tag": "latest"
   }
  ],
  "repl_cnt": 3,
  "repl_req": 3,
  "image_tag_req": "latest"
},
{
  "service_name": "squirrel-stable_readonly",
    "tasks": [
    {
      "task_id": "7zwg1q89zlvvmozphe500xbk9",
      "image_tag": "infra-1108-08"
    },
    {
      "task_id": "cqkj25q600cqebg0qfz4ctjug",
      "image_tag": "infra-1108-08"
    },
    {
      "task_id": "ohc9acmzr7ylmknxkzczgsaf0",
      "image_tag": "infra-1108-08"
    }
   ],
  "repl_cnt": 3,
  "repl_req": 3,
  "image_tag_req": "infra-1108-08"
},

I've managed to extract service name as user macros and based on it to extract required replicas count (repl_req), replicas current number (repl_cnt) and required docker image tag (image_tag_req) as a service bound metrics.
I also need somehow to monitor is service's tasks are running with required image tag. So I need to extract all task ids per service somehow and check it against each service required image tag metric.
I can't understand how to create item which will identify service it's task and task image tag.
My current template
zbx_export_templates-2.xml

[aeromaks]

Will this work, using LLD macro inside another LLD macro like this?