Change structure for identifier dictionary from list to dict

from:

[
  {
    "country": "United Arab Emirates (the)",
    "legalNameEn": "Ajman Chamber of Commerce and Industry",
    "legalNameUa": "",
    "scheme": "AE-ACCI"
  },
  {
    "country": "United Arab Emirates (the)",
    "legalNameEn": "Abu Dhabi Commercial Directory",
    "legalNameUa": "",
    "scheme": "AE-ADCD"
  }
]

to:

{
   "AE-ACCI": {
      "country": "United Arab Emirates (the)",
      "legalNameEn": "Ajman Chamber of Commerce and Industry",
      "legalNameUa": ""
   },
   "AE-ADCD": {
      "country": "United Arab Emirates (the)",
      "legalNameEn": "Abu Dhabi Commercial Directory",
      "legalNameUa": ""
   }
}