How to Grant Access Control List (ACL) Permissions for an Object That Already Exists in Amazon S3 Bucket

In order to grant ACL permission for an object in Amazon S3 bucket, Set Object Acl operation from Amazon S3 connector needs to be used.
Generate the dataweave mapping by dragging a Transform Message component in front of the connector component. Once you select the attributes (double click) from the generated mapping, sample dataweave code is generated in Anypoint Studio.

%dw 2.0
output application/java
---
[
   {
      grantee: {
         identifier: <your-identifier>,
         typeIdentifier: <your-typeidentifier>
      },
      permission: <your-permission>
   } as Object {
      class : "org.mule.extension.s3.api.model.Grant"
   }
]