{
  "manageEntity": {
    "action": "Save",
    "entityId": "1811373517",
    "entityType": "Track",
    "nonce": "0xe93ad6f914c1222be4c02755dfe588485ab9ff7977df8f84b5129d83b87f8f67",
    "signature": "0xcde275f1c5951482347ba35d73d324d30c3a9c27a10d499c7d55614946a465d71db87dca363e4ed4d05844f207bfe65bff03727b12e485e9f7a0b1f49ad03baf1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}