{
  "manageEntity": {
    "action": "Save",
    "entityId": "1053139614",
    "entityType": "Track",
    "nonce": "0x6318e20f66256d33165e88b714a6e2bb447da1ede19e16fe9a183ed7357493b9",
    "signature": "0xa470449ade0ae6619fd7a9d0378d919e7fe316bf88f48475aab197b198b041a249fd458ae68ee1e7fe75c40d1bf3ee828a47c8f43adffffc6f2c1b9ccbbc38cd1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}