{
  "manageEntity": {
    "action": "Save",
    "entityId": "1507203802",
    "entityType": "Track",
    "nonce": "0x0792af4633066721bfe15786865e2c3969638debfa149b717b416530542c58d9",
    "signature": "0x9b3f52ff33f9523509a4db08291c7635fb7a3b33b48e6923db4fa3345705f1b13cdf46feb26ef82aea5313e81b82e898d42fbe8d03b0433f345a9e1a15206e4b1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}