{
  "manageEntity": {
    "action": "Save",
    "entityId": "943388",
    "entityType": "Track",
    "nonce": "0xe2bf46ac867a3f8294da9f8cf8859c153cf9ef59879fea28f41fab9eb9454045",
    "signature": "0xa2151b0a3e2c6704ac798b253fdbffee1ee50eff5c04404e856aa9e0591ffc906b327d697dd9dbe078a8267c233cfe805dfa7968a6c1b991e3d803f7cb8ef0751c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}