{
  "manageEntity": {
    "action": "Save",
    "entityId": "1405947878",
    "entityType": "Track",
    "nonce": "0x3813f99e644d0af9cc2e4d9419f0c4ececd33e88e25b2c8859f74b78806873b9",
    "signature": "0x3ee474cea035a346c8595def4c01153da839d8b342cd27e497a37c319357d2991eeb3f419aeef5347dc77d2451f877e857dc7255fdeab22f9deb736b90d05eb81c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}