{
  "manageEntity": {
    "action": "Save",
    "entityId": "567339871",
    "entityType": "Track",
    "nonce": "0x2f7ecc957b5e059723811dcf3e8b73d9dd1366ded86941264bf5cbe072f34f9e",
    "signature": "0x198c5e07967cd022dec15adfeeb9af032e804f48112f84f103f6a780f98d7a9170c3b3820709913a235d8e024dde9cb6ec506b33a69ee35ed71f30cd3efc81f41b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}