{
  "manageEntity": {
    "action": "Save",
    "entityId": "460282622",
    "entityType": "Track",
    "nonce": "0x85796e6121adca97d8873f6d55b177b7ccbb266cda72b1815a7e55a32232cf6f",
    "signature": "0xa0471a8a6f4dda078f0015970fabcd0c8f77c6051c553ff3958e4eec4e0876912ac52d7583db5a3368c526a9fed4c8f4dbae1e7e990a16c1258025280d25d2341c",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}