{
  "manageEntity": {
    "action": "Save",
    "entityId": "1375761099",
    "entityType": "Track",
    "nonce": "0xdb9809235e770e9ed32d827553f8254bd9e9abba5ec2a2a3ae065a43d1b8db05",
    "signature": "0xee261bc3da4078cd29b4b66a7c66d826d5a83b9a571ee09a6651a7ad661ca4a768a4ed1106142edfb25d9eead66415a700daf09447f9c48f21ebd9bad5d47f3f1c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}