{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121120002",
    "entityType": "Track",
    "nonce": "0x156eadba899a06b691e6d6f3539674174411e3eb1f5701f02590379e9e368481",
    "signature": "0x2b6835887b605d6acca1767e6f2ec900fba6988f1f4880258a396e2e7594e5366afeb5aec68d58afa766cd6fcd5165179f0e245b94b2649d8e9b383e88ea830b1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}