{
  "manageEntity": {
    "action": "Save",
    "entityId": "511554",
    "entityType": "Track",
    "nonce": "0x20d2ac6c9c0d2d782f0d6d064e3b648b1ccd7f3011e30307a08fbab288281c44",
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    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}