{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075783",
    "entityType": "Track",
    "nonce": "0x73ed0d355e32c1a52ccf91bbb8926504f348db92b16754ac7592af157f9fa86c",
    "signature": "0xf759d264c38a7b3108fb54b24022e4545c0f21cfeed34d062494bfcf89c38285007c5158067aab46009cc66f1fd78e8cefe82c0147ca55f1588c0841f61080f81b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}