{
  "manageEntity": {
    "action": "Save",
    "entityId": "1701036715",
    "entityType": "Track",
    "nonce": "0x891623d7f9e953ce125687934ca1eb29c2c37fb8723255b733dcfc287e4a0cfd",
    "signature": "0x50b527c64de325a0fab5fe69cfcf708496549c6bc3604ea7d66851b2401b1016409af847764ac25875d05b6394518a07011d068d625d884494ae4be930b3f9d51c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}