{
  "manageEntity": {
    "action": "Save",
    "entityId": "400693298",
    "entityType": "Track",
    "nonce": "0xd2a8195c5bc6c6f06ad5791c18c0bdaf5c815aaaacf915cbae098c90606b493d",
    "signature": "0xb0f7d6ce4cfefcaa2503bb1a4055c289ca7863bea2dcc2321a594e824f2f342c5d1e44e4d0a2a4edd01e9ea1d0322432974807af1111dd5bd3179ca3ab50faee1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}