{
  "manageEntity": {
    "action": "Save",
    "entityId": "1304965842",
    "entityType": "Track",
    "nonce": "0xfde0288fd723fd6489c8726c60529ed374da50c7c4a57c70b8f54554d049cf68",
    "signature": "0x8c3ec27802021fc1d6c2653357ca5912203487f2e1ca07d3cf1c0cc064279a5f262051dc0b726da9528731464eecade7fda2076686a456bda0f9a3b712794df41c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}