{
  "manageEntity": {
    "action": "Save",
    "entityId": "464579",
    "entityType": "Track",
    "nonce": "0xca6ce0e9ba245d98a7c971d525455c0969ba7e67b952ada3884fd0018dd14058",
    "signature": "0x6b7a7f38d12adbd00806651c0351fa9d48ad0ec8793eda600da2e62f8614530063557f84acb8c0b669d660fc978d3e5f47e2091891548d981698960558e5c67a1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}