{
  "manageEntity": {
    "action": "Save",
    "entityId": "1357532820",
    "entityType": "Track",
    "nonce": "0x35767dae59a1940136ad04c9d067860a321442c4c18b17acfdcf765b30cffeab",
    "signature": "0x3dcead0a3ca457731f2ffeba3354603d827cb81a8e1526912e5c12571cdda81618e9b19e36474067531a33299eeb9191638dc5f8ecadf3bdd5ed772b8f0bacef1c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}