{
  "manageEntity": {
    "action": "Save",
    "entityId": "328041",
    "entityType": "Track",
    "nonce": "0x8c91f023182723576c509526e1c20fdd9e073c460c354ed9319fb5cb9258929a",
    "signature": "0x42c899d1f3ae5558959143964328fd8dab678f8ed86e226ef0bc60714025844215e765cd97f1610f402d207d72caee0bfb688e37ca00e0354b6e7bc19a3fdbc01c",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}