{
  "manageEntity": {
    "action": "Save",
    "entityId": "67411167",
    "entityType": "Track",
    "nonce": "0x7dd0e6957b1af3d587c77f16b00ff228769ec50252fc706058d2f01de5f41bb3",
    "signature": "0xbaf03b247d1eb66d0b87df96b30115d40d4b35939dc8772d5fa6f539343a2319031733ac2069f55308c496183e91d8811f6f6d2d369dba39507b3b16e9ccc1ee1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}