{
  "manageEntity": {
    "action": "Save",
    "entityId": "552282272",
    "entityType": "Track",
    "nonce": "0x832fb8f26c38e9d5ae5188524df2b9b0cc435cf8e87426a7909a9773ae128500",
    "signature": "0xb8cbef934c6ebc673bdf831051701f03a6a7118709deedb601e921f17369e5db12bf06a2318a874ab42c0a267551af56cbe72639613afc5fb32a272407fbeaca1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}