Get service group custom attributes

[
  {
    "customAttributeValue": {
      "customAttribute": {
        "description": "Custom_Attribute_from_API_test_1_Update",
        "id": 64,
        "name": "custom_attr_from_API_test_1",
        "organization": {
          "activated": true,
          "id": 92,
          "name": "Brocade Inc",
          "uniqueId": "msp_92"
        }
      },
      "description": "Desc_Custom_Attribute_from_API_test_1_Update_msp_1",
      "id": 397,
      "value": "custom_attr_from_API_test__msp_1"
    },
    "id": 1290,
    "tagSource": "OPSRAMP",
    "taggable": {
      "entityType": "ServiceGroup",
      "id": "SGP-d7657432-3698-4894-a07f-c2ef9aa0789q",
      "name": "BB"
    }
  },
  {
    "customAttributeValue": {
      "customAttribute": {
        "description": "Creating Custom_type for Provider-Update",
        "id": 71,
        "name": "custom_attr_type_for_service_provider",
        "organization": {
          "activated": true,
          "id": 1,
          "name": "OpsRamp SaaS Platform",
          "uniqueId": "org_1"
        }
      },
      "description": "Creating second value for S Provider 2",
      "id": 409,
      "value": "test_val_2_for_custom_attr_type_for_sp"
    },
    "id": 1275,
    "tagSource": "OPSRAMP",
    "taggable": {
      "entityType": "ServiceGroup",
      "id": "SGP-d7657432-3698-4894-a07f-c2ef9aa0789q",
      "name": "BB"
    }
  }
]