{
  "manageEntity": {
    "action": "Save",
    "entityId": "1432967020",
    "entityType": "Track",
    "nonce": "0xb58432115c90de9d5b2e6cfd13ec1e1fb0cbce961e94a3f341e592fc76f41950",
    "signature": "0x6b48e11d61d63b2d5cee462c81457495b7874aadddaec33e8f224c724d33592957e56bd4f12c5b030ffe4230f54b0b33aa8787c2e37203b12299d584cea3edda1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}