{
  "manageEntity": {
    "action": "Save",
    "entityId": "818009342",
    "entityType": "Track",
    "nonce": "0x93d5ffc1395878cd96bcae5fee9bd4cfbe900208343f7e15053a5ef4d32bab5c",
    "signature": "0x1cdc721b0b1ab4bf0d48e2c35606a22275ebafff8841f675fe91ceee8294880831d72a7425294513bf316aa7165519c4214a4ddab8c708b63adcdacebe37481c1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}