{
  "manageEntity": {
    "action": "Save",
    "entityId": "563796975",
    "entityType": "Track",
    "nonce": "0x265229d37f44d7516b4f0305afb833c952fb22c67daf5ffc4adb56bf92087781",
    "signature": "0x1e6bed2659c0559ffe2aaea7e3e00b317ad24b14d5c9438869f962d6943076126bf6d715d570fd592d0686b2835ce7e5560b3767d06f018ef2a11b286933e35e1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}