{
  "data": {
    "@odata.type": "#Microsoft.Dynamics.CRM.StringAttributeMetadata",
    "MetadataId": "8f901234-5678-49ab-bcde-3456789abcde",
    "LogicalName": "new_customfield",
    "SchemaName": "new_CustomField",
    "AttributeType": "String",
    "AttributeTypeName": {
      "Value": "StringType"
    },
    "IsCustomAttribute": true,
    "IsPrimaryId": false,
    "IsPrimaryName": false,
    "IsValidForRead": true,
    "IsValidForCreate": true,
    "IsValidForUpdate": true,
    "RequiredLevel": {
      "Value": "ApplicationRequired",
      "CanBeChanged": true
    },
    "DisplayName": {
      "UserLocalizedLabel": {
        "Label": "Custom Field",
        "LanguageCode": 1033
      },
      "LocalizedLabels": [
        {
          "Label": "Custom Field",
          "LanguageCode": 1033
        }
      ]
    },
    "Description": {
      "UserLocalizedLabel": {
        "Label": "Custom field added via API.",
        "LanguageCode": 1033
      },
      "LocalizedLabels": []
    },
    "MaxLength": 100
  }
}