{
  "manageEntity": {
    "action": "Save",
    "entityId": "1221269309",
    "entityType": "Track",
    "nonce": "0x636f49ca7d3563e28dd43d0eccbac1e53d91ea221c53ff06bb9ec57d7b78b7aa",
    "signature": "0x57e6b6af0edb0852d003aa380f4184f52123fc239c7e704c5213c67e1fd8f28e54234f1c7b0af582ff19c74555c812ca3bc82a04861dab7bd1f98eea2cfb97c81b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}