{
  "manageEntity": {
    "action": "Save",
    "entityId": "1242696597",
    "entityType": "Track",
    "nonce": "0xd26549d427e8f91c3e4d03917917aec0078d4557526b2939599a7c59d5306568",
    "signature": "0x9b07e14d9001676dce364ba1826f72fc104d7caa7f57c40a7f92864dafb3b3a9417ca5e275bae55683fcaeeda73d2ee38c1763bbc6befb37735591a8f1de30d41c",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}