{
  "manageEntity": {
    "action": "Save",
    "entityId": "1733975247",
    "entityType": "Track",
    "nonce": "0xf4db4258dce74121a4412d62b4dabdd425b77197964a3c7fac2c08840897acd9",
    "signature": "0xb42dadbfd1215f9c47c9590bfdf8fd0e957aa5f583b0177c29b2aa0f3d8f4168133a1750f5f8492ffb7a9ef664585802e7844613ba34f6c71a7e478534f81a791b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}