{
  "manageEntity": {
    "action": "Save",
    "entityId": "1269574787",
    "entityType": "Track",
    "nonce": "0x8f4eeb8a722eb00ce1c71344335b84fa0b2033016ee22b3a23bbd79dae63b47c",
    "signature": "0xc878743a8e93246763814d0aab74067e0e2ad3f213f72c05dc09e7e0ae04b3894b74663e3b4c2c9af1e9c3f8121b203586a3e6b9556d6937bca844208f0179211c",
    "signer": "0x72d1844BB49347afC0912B6743298568BC02b404",
    "userId": "328108"
  }
}