{
  "manageEntity": {
    "action": "Save",
    "entityId": "1192145231",
    "entityType": "Track",
    "nonce": "0xcdf8c4b6573b7c8d4423b54698217fd67220230c0c0eac35854f933abd260599",
    "signature": "0xdf994c7f0b7cd76778aeaf7282b2310775e80038a3178ef39f398ecae5669dea4dc44b3b20e29a29ec48ca73263c71093673df805f1c04ad388daeca577c5f421c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}