{
  "manageEntity": {
    "action": "Save",
    "entityId": "1923048993",
    "entityType": "Track",
    "nonce": "0x85fdf1aa03a4d629faa21394d36bd5c751e478c9883d45282ed8e291d9ead43f",
    "signature": "0xb00d75d6ce4cea26b55ccfa46d72cf238d138107e024802afb7ec8fb0431f3a22f280b650020f5052a264eb2bc44a59e48e633a7a740142648e25efd9d90e55c1c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}