{
  "manageEntity": {
    "action": "Save",
    "entityId": "2107145737",
    "entityType": "Track",
    "nonce": "0x504b7fd146bda0278d8897aaa3557a205fb1a6dfcc412ee2972994079bd0893e",
    "signature": "0xee4dad8ae8ebb939551b9c5e4eb2042195b2cf1f7aea6ce1a7fe71dbf892a2800b904e431157726fa10f5725a6f4a8e0248325cc554a62a0a6d3791fa3f0c6911b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}