{
  "manageEntity": {
    "action": "Save",
    "entityId": "2146568463",
    "entityType": "Track",
    "nonce": "0x02b29e62d3935210318394801d5dca8eb7f0e671ce48cbc6cbb7c295df8b5f93",
    "signature": "0x88300149d363dfce8adf70dd26e2867aae72cfb5f375c4365fd0206a022880135aefffc9f60dcea1ad7c8e1837307f193724e8352738ae3e14acf1ae0d6bd8231b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}