{
  "manageEntity": {
    "action": "Save",
    "entityId": "1493289911",
    "entityType": "Track",
    "nonce": "0x8a386278f6ab4ddb1a39857668417cce7b0862b84790afcc5cfae2536e2c2da6",
    "signature": "0x79945491f1b192ddf16a7fd5ec93ef4c9404f3fdddd27c57c1ff1ed9cb94a33233184985dfa197add6c66a1ff5d54d21d00a0c88e15e828e1ccc1be4aa2bffaf1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}