{
  "manageEntity": {
    "action": "Save",
    "entityId": "835424707",
    "entityType": "Track",
    "nonce": "0x412aedfb0f6b888ef2bc244086dd2ffc225b176dcea6448e13216322e94df4c0",
    "signature": "0x63d1de6e53e35d738441db8890923dda1fff5ce2b5b18787b19a364592e03bd8451799f3ca4d070a86a28fafdfaf573a9ae96e135fae96b92746d5127fa79a5c1b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}