{
  "manageEntity": {
    "action": "Save",
    "entityId": "1524541247",
    "entityType": "Track",
    "nonce": "0xa59605c98ccf64e50ae93dc3b4c935320cf680886707fa989f43704797aeb6b4",
    "signature": "0x0ae848e37e44f00d1d43e7e4f962cdca0a4c1fe8e25dc90e413de7e126b569e22982687bfd0d835b9949a2737ff70e45351d9155615c57f1fa4d146438c5fa631c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}