{
  "manageEntity": {
    "action": "Save",
    "entityId": "692961",
    "entityType": "Track",
    "nonce": "0x49b59e30ed7748ae3680cc19547a2eafa48497ffb238109473005ac389913384",
    "signature": "0xdaf130ad3d35d14e5f6ad85078adfb2d4e983342003855c0eff59efd6c83dc3e27296fb922dc5c091d90adc69443ce73e1fbec0c05ffefb93c01cd6d2fb4d4441b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}