{
  "manageEntity": {
    "action": "Save",
    "entityId": "136421",
    "entityType": "Track",
    "nonce": "0xf08293bfbc48847c3ce3fddd522fa68b4cbdc4db105944c2691a50ec40be2d61",
    "signature": "0x692c336f3fd5a25432272fd2c8a04ca03caf1d9bb86e94789e6686af4d95e00d0722133ba1588c16ebf2f23c0ab79d54b19b4cbfd46d8ca9c14eabc2c4b096a51b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}