{
  "manageEntity": {
    "action": "Save",
    "entityId": "1398651657",
    "entityType": "Track",
    "nonce": "0xfa32095a9d42ee291496664fbc007a6f640ec5b4184b319f977cded573ee0b8a",
    "signature": "0xba6fce825076199352965dcaeb2a4c3c1cbf8601f64ea91d8194330abb6046ab10dcc82cae2a6c95aafd792f53f1709758576561499de53e9df2189a6f3ea5b31b",
    "signer": "0x775bA7FB8a4FF9354c099465ca493BA949FdAca6",
    "userId": "597677270"
  }
}