{
  "manageEntity": {
    "action": "Save",
    "entityId": "106582",
    "entityType": "Track",
    "nonce": "0x125c7b14c1127a008f471b3487765d251a8ac00f581156a856272f65a09d0bbf",
    "signature": "0x8506354d5e2bbb81b1d82dce3edac7887984572728bf3c3f09924bac05f8fbdb13ea13d875a857ef4eed4708802f045a89f6186316d77ffcf9f2dff230904f0e1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}