curl --request GET \
  --url https://sandbox.tight.com/v6/templates/chartOfAccounts \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "coa_123456",
      "name": "Standard Business Accounts",
      "businessTypeId": "bt_789012",
      "accounts": [
        {
          "id": "tgla_324231",
          "accountNo": "11500",
          "name": "Accounts Receivable",
          "level": 3,
          "type": "ASSET",
          "assetType": "AR",
          "children": "<array>",
          "customData": {
            "internal_key": "some_internal_key",
            "some_other_field": 23434
          }
        }
      ]
    }
  ]
}