{
  "manageEntity": {
    "action": "Save",
    "entityId": "858765521",
    "entityType": "Track",
    "nonce": "0xeb690429e6bc02fe711d7d9f351cb0514ae5f6833edc044bbf8b9631e522b1f7",
    "signature": "0xca73f6029e5114ae6bdc94ca92af7496163c2c3ede09d87ac899de7e4a53a841041aef615eecf99af829b409e4c0cf1a4b4c4fb436be42ef254c0ace6f58370c1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}