{
  "manageEntity": {
    "action": "Save",
    "entityId": "1146005032",
    "entityType": "Track",
    "nonce": "0xb574b1aad85859419fbca6c50915e9ad0d3d73cde92d8a647e4436498186ac9b",
    "signature": "0xdad3b04abd7960b9e830d2b72ba654916a859dd6ba0c88c306d6d75f1540a5196d5b638426f0d44804a9183a621dbefeeec5ca024935b5418778d52fd1886cda1c",
    "signer": "0xe6bc5bC6d57c81E3B9eD5Bb75CcdF73f819033c7",
    "userId": "713134039"
  }
}