{
  "manageEntity": {
    "action": "Save",
    "entityId": "2091679971",
    "entityType": "Track",
    "nonce": "0xbc875ad07d6528f1dfa3d0a11637106a93f9f098dc255affc5fee279bcd49960",
    "signature": "0xc60c4a9cf2b4817f4d4e09b5b062989cc9cef0650f6ef69bbfdb59994b7c73996bccf7869a95dc3ba90cb52b890f83b2fc9fa4d38beffb43d170c43721b5c4fd1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}