{
  "manageEntity": {
    "action": "Save",
    "entityId": "1883394996",
    "entityType": "Track",
    "nonce": "0x536f384f264ff8fa519886ab6bd952128c45ec7c246879183983b2bba352cd77",
    "signature": "0x2fc00849023a38167dcfdaf40721b9a9938db18acf755a16a234e7c93a6bd2c504393f7e187ff7f2f3dc3f1ee30e8937f6554104c79b49057b336c98203c7b331b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}