{
  "manageEntity": {
    "action": "Save",
    "entityId": "822685",
    "entityType": "Track",
    "nonce": "0xdba926b31f773ce4c7f62f594f6b537030f58d2d64c399ce529a7c89a8c92a38",
    "signature": "0x8eea2a040bdf2f71926f4fa24c5660fb13637062946358b307115b7eef810ab967f000449cdf5c7c6a237639be0d70a7ea8b86779c507ead50395fe550afb6501c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}