{
  "manageEntity": {
    "action": "Save",
    "entityId": "785327",
    "entityType": "Track",
    "nonce": "0x83115321d16b72f6f13f68522d8e6ee0c51e0115fdcac76bc4ce09095dbede17",
    "signature": "0x6a6dd45acb9f09381ab59d45de9325514fb6bc3ed6f8d38510ad56db6ae8e94461bcdd4ba541b72f4f614866f4a91a24c310d04a5a6e2dc1d25889a0bde198761c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}