aws_lambda_events 1.1.3

{
  "ServiceToken": "arn:aws:lambda:eu-west-2:123456789012:function:custom-resource-handler",
  "RequestType" : "Create",
  "RequestId" : "82304eb2-bdda-469f-a33b-a3f1406d0a52",
  "ResponseURL": "https://cr-response-bucket.s3.us-east-1.amazonaws.com/cr-response-key?sig-params=sig-values",
  "StackId" : "arn:aws:cloudformation:us-east-1:123456789012:stack/stack-name/16580499-7622-4a9c-b32f-4eba35da93da",
  "ResourceType" : "Custom::MyCustomResourceType",
  "LogicalResourceId" : "CustomResource",
  "ResourceProperties" : {
     "Key1" : "string",
     "Key2" : [ "list" ],
     "Key3" : { "Key4" : "map" }
  }
}