{
  "manageEntity": {
    "action": "Save",
    "entityId": "624063",
    "entityType": "Track",
    "nonce": "0x4a73656240732c5381e4da6704d0ed366ef7756ae0c23bc4afe1d88aa26d0537",
    "signature": "0x072fd8287eae19e06429b6110702ef12f21a6185ef10166e17b3d3e851b92b8e1d13e26dca0e90a3259615d5e7f30304dba49dbfb2fbc3a2307335cce2f50e771b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}