{
  "manageEntity": {
    "action": "Save",
    "entityId": "596372502",
    "entityType": "Track",
    "nonce": "0x1fe381861bfa45f321ac79392c9654f7b4811ff66e5f68e876c16f5195db5582",
    "signature": "0xbb54eca7e1168beb85b6e8fb95e79945b0025b7afddf820ba274eef8e67453a3301aa8e302071a96703047fd74c1f2a54c36a90bb29fc55812f0b62a2f48fd2c1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}