{
  "manageEntity": {
    "action": "Save",
    "entityId": "1244938269",
    "entityType": "Track",
    "nonce": "0xcd2a17dff9f4d8b3cd589ff2ad62773589e0a8a4005ab0574b8284ad70f64c81",
    "signature": "0x6b7af2179881f5f665fbec2b37e6569c9c52748cdf9b2c103c8f4e66c4e1aae535e5bed70104d65e66f14e5fde7c546c8ad0f6c8dfbd998582fa2c5c27ba1f871b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}