{
  "manageEntity": {
    "action": "Save",
    "entityId": "1131301849",
    "entityType": "Track",
    "nonce": "0xa94bff91ae0814338c9cb53e58a34d9eead93a7e5db5c72f6c4bc1a78185d0ea",
    "signature": "0x52abbfe99fcceccd551171bc8390bfbc5b14dcfa1d6ff6ee390c984d8d2c74520554d1163c1cdb86f9c950da60e9b4ff423864962f6e6240c5665c699da1de6d1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}