{
  "StackId": "stackidarn",
  "ResponseURL": "http://pre-signed-S3-url-for-response",
  "ResourceProperties": {
    "StackName": "stack-name"
  },
  "RequestType": "Create",
  "ResourceType": "Custom::TestResource",
  "RequestId": "unique id for this create request",
  "LogicalResourceId": "MyTestResource"
}