{
  "manageEntity": {
    "action": "Save",
    "entityId": "942519",
    "entityType": "Track",
    "nonce": "0x166d6e8432fc89b0f395519aca2b0a774cdb51f156f6a23f1bc35b9518c28ffd",
    "signature": "0xfaffda4f9537fa9f18322f9cd9a2d759ed9d375a3f2a5f8b0b8346a0a10deb024139356f3729883ad59b0dd2e1e56e936ac1b3d8a5afcd1ff3a81a629a84cc111b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}