{
  "manageEntity": {
    "action": "Save",
    "entityId": "434313567",
    "entityType": "Track",
    "nonce": "0xf629e0d304e4040ebf8098949cb763883afb582a42a3f3739aefe33b94b01380",
    "signature": "0x87ed25c61a9378989bc1b1b22e3c2f14d1aa7f40c44d1d9023f6a3e3e02ad8b149f70154eab8f680b2e7b66f4e9314b56caf8a791716985cc4333599da5160eb1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}