{
  "manageEntity": {
    "action": "Save",
    "entityId": "358392140",
    "entityType": "Track",
    "nonce": "0x0446681156abb014fd68463e2a70f022eb56354bc18561964d87e0d35461a909",
    "signature": "0xedcdf5f110843e0b593f8d56cf45f83df452e9fb011fe82dd08462eb5f18d9d65b2cd85ac8d0e4cd5b93a8a566fa8d34551352e6df98a893c0c23fe858cfab9c1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}