{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "828497626",
    "entityType": "Track",
    "nonce": "0xb7d5385e18306e1d58b59c171093d45d5aaf567c1c1b901b30e08023cc6b5457",
    "signature": "0xec052d69252821ce93c14a46da2100f07b9a1aab5ef691024b6aebaafc47cec0699d3e77a7024a08f1fdc93fd117b254283905b005d27e58552752312cdc670e1c",
    "signer": "0xc4A500E17D812B285447720CCcb7F8eB148c91bd",
    "userId": "256479919"
  }
}