{
  "manageEntity": {
    "action": "Save",
    "entityId": "1452779097",
    "entityType": "Track",
    "nonce": "0x6b037868e6868ccaf52c5a84529abb448db66b2cb973b25b69f59119977093ab",
    "signature": "0xa975e2f9e05c143bac7b03af3ca24580f6d9def65e4def038f41d46e4fa1484b57704a2921d8e37ee49ee246762dc3a5a37eba50f9968d16b91488247bd7bec91c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}