{
  "manageEntity": {
    "action": "Save",
    "entityId": "1496052814",
    "entityType": "Track",
    "nonce": "0x221c857e1e4e41b1feccddde22987c82dddd5e487f82f3da8becac7a1e72a363",
    "signature": "0x274136f7fb1fcae6d445e1a32b5604d09e2a1ea317e6c8c71eaaf81a270f50e46c9a271e426177eaad6d520f5abcbe6a619192d65af3b2e9887ccf45d56a49ab1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}