{
  "manageEntity": {
    "action": "Save",
    "entityId": "1499969329",
    "entityType": "Track",
    "nonce": "0x5c95168d701718f96016e5bc3d3d8c7f605bc665ae201678253f6fd9788360c6",
    "signature": "0xcf250b25db7749de09a6ac4aae34f87750b7ad60d1cabff8b986632b72553c5228bf0894e55ba1288827d5c56bc9b9c558ed155c124114168bc6bcb2eda068b01c",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}