{
  "manageEntity": {
    "action": "Save",
    "entityId": "548963",
    "entityType": "Track",
    "nonce": "0x083b310ae34e40a4cfdbe2ca48ac969074aefafeeef2486d3e234bcfa43b1240",
    "signature": "0x8b441a9ee837af8fba6aff3c650ee0138b83d48e1579496b45ef881ccedda2e73f3516a30e4f62d9404545b6534911f756da3c6b35a9f5fcf2059a280a9444f91b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}