curl --request GET \
  --url https://api.light.inc/rest/ext/v1/customers/{customerId}

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>",
  "email": "<string>",
  "address": {
    "country": "UNDEFINED",
    "city": "<string>",
    "state": "<string>",
    "zipcode": "<string>",
    "street": "<string>",
    "street2": "<string>"
  },
  "status": "ACTIVE",
  "description": "<string>",
  "vatNumber": "<string>",
  "businessRegistrationNumber": "<string>",
  "easCode": "<string>",
  "einvoiceAddress": "<string>",
  "einvoiceNetwork": "CII",
  "type": "BUSINESS",
  "logoUrl": "<string>",
  "domain": "<string>",
  "externalId": "<string>",
  "externalSource": "HUBSPOT",
  "createdAt": "2023-11-07T05:31:56Z",
  "updatedAt": "2023-11-07T05:31:56Z",
  "customProperties": [
    {
      "groupId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "groupInternalName": "<string>",
      "values": [
        {
          "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "groupId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "groupInternalName": "<string>",
          "companyId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "internalName": "<string>",
          "label": "<string>",
          "context": "<string>",
          "createdAt": "2023-11-07T05:31:56Z",
          "updatedAt": "2023-11-07T05:31:56Z"
        }
      ]
    }
  ]
}