{
  "manageEntity": {
    "action": "Save",
    "entityId": "1162915506",
    "entityType": "Track",
    "nonce": "0x918ed9aa4e77f9750a897ef245f168b262bc347d855a60da891129d368c48d93",
    "signature": "0x4774debfb42544cf92779e93b45b6ba7ee89d35c8f7eec12978ca2eb2da8c3f52d4fe750c756f8d720d07e34416dd240d1a73313f56d03b653122a2941669c7d1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}