{
  "manageEntity": {
    "action": "Save",
    "entityId": "1442134506",
    "entityType": "Track",
    "nonce": "0xb35c9c69c0777af20594c62561ecb112b8bfea7352e47b79b06b53e41cc2c7b3",
    "signature": "0x6dde7faa9c3f35c8644ab8da789f321d0e936fd8ddb88cbbcacb185ef9aeed55388e40dbd8897f449a2ae929a99565f4a022f6d0536a9b41682d6645ba662d621b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}