{

"ResourceSpecificationVersion": "1.0.0",
"ResourceType": {
  "AWS::CloudFormation::CustomResource": {
    "AdditionalProperties": true,
    "Documentation": "http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cfn-customresource.html",
    "Properties": {
      "ServiceToken": {
        "Documentation": "http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cfn-customresource.html#cfn-customresource-servicetoken",
        "PrimitiveType": "String",
        "Required": true,
        "UpdateType": "Immutable"
      }
    }
  }
}

}