{
  "manageEntity": {
    "action": "Save",
    "entityId": "676399335",
    "entityType": "Track",
    "nonce": "0x1c32d44c91ef19675604a9e535e56c454e25f6b1f18a1dad1af27a9b0493f98d",
    "signature": "0xf11b111cb54fe9f12b2af496a73d42fb51f43f067ed9737cc423721a2c36fd5a0d92801d73ee255895e5102b47c03db216ab6276865ed9551b117e0b606507791b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}