{
  "manageEntity": {
    "action": "Save",
    "entityId": "685337182",
    "entityType": "Track",
    "nonce": "0x7cf7850ee58b7e975cf5c1f418c025a92a94f1a33c77bc8bd5c1ecbcac9ad923",
    "signature": "0xe16ce29cc278ce7e2f4c28d0c8fe8b53b7a7a233881cf2adcf81f887a79e6f166156542ed5291ef3f1fc1d3d0a2b9a98e3becb8c0686699a2434c0eb1cea96691c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}