{
  "manageEntity": {
    "action": "Save",
    "entityId": "365744351",
    "entityType": "Track",
    "nonce": "0xe451449fe778cd8bd81f1df91e834c3b6f613b9621807c7b05e3b36d46014505",
    "signature": "0xd4d06d9d37fbb7f44727991ff6ef5dd78e2be83d91bf500a06050a5e8006957d7f1816a7caca01190bf3ca33befa32ce230d912f2b87b427628be9fc79ec44bf1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}