{
  "manageEntity": {
    "action": "Save",
    "entityId": "1489364244",
    "entityType": "Track",
    "nonce": "0xe0f0ed8456654c56b2e10087bb16541ca73c39de67cdd6f0cbd19d8c13d6fbc3",
    "signature": "0xa07829a3d3362b6cf3ba36442b4589235bb6c633a7e901d8a39f44169785b1725e51c944adcbb6e8064f5ecfb807656ff231560bcd3e88a835ba6f82586c2b541c",
    "signer": "0x44577d90A171E208f723dEEa39019067c9Dd87E8",
    "userId": "853591809"
  }
}