{
  "manageEntity": {
    "action": "Save",
    "entityId": "1527378865",
    "entityType": "Track",
    "nonce": "0xc57a1f9cda080e8b0e2654b81f0aa7f0b155f9d07439600a16c22f56564cc935",
    "signature": "0xb7d97112cdfc1624c1b854c2fc0d9bb09341916f8dba183c031a3c8aa82d856e638c07d050a3307c7316c7a9d15eab4eddfe614ed8a6dcbf2b9f7f91baa5fb5b1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}