{"type":"ref-updated",
 "submitter":{"name":"Submitter Name",
              "email":"submitter@example.com"},
              "refUpdate":{"oldRev":"0000000000000000000000000000000000000000",
              "newRev":"deadbeefdeadbeefdeadbeefdeadbeefdeadbeef",
              "refName":"refs/tags/refname",
              "project":"project-name"}}