{
  "manageEntity": {
    "action": "Save",
    "entityId": "1910887872",
    "entityType": "Track",
    "nonce": "0x625e0e1befdc9c3ef922c7c8e6da22baf8086f4cdf671f339eee7ae842c8ba63",
    "signature": "0xf6d241f8efea968de4ec7c809e253e215735ac843d28a2673bec66ca3ce997b6365e1c973f46f4933ef868dfbacd5ddfb2fe71a7371882b2b8717bf0e66247bf1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}