{
  "manageEntity": {
    "action": "Save",
    "entityId": "503201939",
    "entityType": "Track",
    "nonce": "0x8a6cdaeb9677942cc534c502fcdddbc22ca08050c676adc5135c8dc3b0774f86",
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    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
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  }
}