{
  "manageEntity": {
    "action": "Save",
    "entityId": "834724711",
    "entityType": "Track",
    "nonce": "0x068127ad18381cb87f892a9459c63351544ab2478e39b9fb4c8d0fd796c03238",
    "signature": "0x6aa5c8086922f18bb3c5cb6b0cbf62f8932cdc22e36dbd42c4d957e55cdb030101e2021c60688cf68e11496cbe49482c6fe175d22819e89f8b5d217a5d5edfa81c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}