To select files based on a specific property, modify the "aql" field in the JSON. Replace the "@key":"value" placeholder with the actual property and its corresponding value. For example, if you want to filter files based on a property called "version" with a value of "1.0", the "aql" line would be
"aql": "items.find({ \"repo\" : \"example-repo-local\"}, {\"@version\": \"1.0\"})"