Merge two dicts in separate list by id

I'm trying to merge the object based on key specs, most of the keys structure is consistent, taking into consideration the merge will only happen if company_name is the same (in this example, I only have one company_name) and if only (name, {color, type, license, description) are equal across multiple lists.

[
{
    "company_name": "GreekNLC",
    "metadata": [
        {
            "name": "Bob",
            "details": [
                {
                    "color": "black",
                    "type": "bmw",
                    "license": "4DFLK",
                    "specs": [
                        {
                            "properties": [
                                {
                                    "info": [
                                        "sedan",
                                        "germany"
                                    ]
                                },
                                {
                                    "info": [
                                        "drive",
                                        "expensive"
                                    ]
                                }
                            ]
                        }
                    ],
                    "description": "amazing car"
                }
            ]
        },
        {
            "name": "Bob",
            "car_details": [
                {
                    "color": "black",
                    "type": "bmw",
                    "license": "4DFLK",
                    "specs": [
                        {
                            "properties": [
                                {
                                    "info": [
                                        "powerful",
                                        "convertable"
                                    ]
                                },
                                {
                                    "info": [
                                        "drive",
                                        "expensive"
                                    ]
                                }
                            ]
                        }
                    ],
                    "description": "amazing car"
                }
            ]
        }
    ]
}
]

I expect the following output:

<pre lang="Python">[
{
    "company_name": "GreekNLC",
    "metadata": [
        {
            "name": "Bob",
            "details": [
                {
                    "color": "black",
                    "type": "bmw",
                    "license": "4DFLK",
                    "specs": [
                        {
                            "properties": [
                                {
                                    "info": [
                                        "powerful",
                                        "convertable"
                                    ]
                                },
                                {
                                    "info": [
                                        "sedan",
                                        "germany"
                                    ]
                                },
                                {
                                    "info": [
                                        "drive",
                                        "expensive"
                                    ]
                                }
                            ]
                        }
                    ],
                    "description": "amazing car"
                }
            ]
        }
    ]
}
]

What I have tried:

headers = ['color', 'license', 'type', 'description']

def _key(d):
  return [d.get(i) for i in headers]

def get_specs(b):
  _specs = [c['properties'] for i in b for c in i['specs']]
  return [{"properties": [i for b in _specs for i in b]}]

def merge(d):
  new_merged_list = [[a, list(b)] for a, b in groupby(sorted(d, key=_key), key=_key)]
  k = [{**dict(zip(headers, a)), 'specs': get_specs(b)} for a, b in new_merged_list]
  return k

result = {'name': merge(c.get("details")) for i in data for c in i.get("metadata")}

print(json.dumps(result))

<pre>{"name": [{"color": "black", "specs": [{"properties": [{"info": 
["amazing", "strong"]"]}]}]}