{
  "manageEntity": {
    "action": "Save",
    "entityId": "854788",
    "entityType": "Track",
    "nonce": "0x9ceffbd10863ffa2b616af0fa1dc5e1d25c1e43313aaa4140480bb1f232f85c1",
    "signature": "0x5287b4cfdffda58c43ae380edb5a9283e530ab32780af1d328d67b3af7d9c94420acf675c12dc45cdd9261f4ab3cd901297df09ed19eeb737718468ee022fcd91c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}