{
  "manageEntity": {
    "action": "Save",
    "entityId": "563101195",
    "entityType": "Track",
    "nonce": "0xcdd0507260674e94a8ccc07a82c91a15dd0395ea6fb6bf28cc87a8c9bc02fe33",
    "signature": "0xc79c80ed70d39e4837b6d49a7e1d5c0033b034f4fee14c95a24ca5c875329a5a6b633c6aa07e2761a734530c42983bcd6b77182fcb76050b6ff59885f8be3bfc1c",
    "signer": "0xB18b1793545F350C53589f5BA9BfA143b7F15eE5",
    "userId": "417591612"
  }
}