{
  "manageEntity": {
    "action": "Save",
    "entityId": "16918",
    "entityType": "Track",
    "nonce": "0x3db0465283eace2b955bb12c1ed1686076d573c39bd1cc1655e13cf2c2649065",
    "signature": "0x0b3c8d064d84a9844734375dc462e99a5073bf48f8d9e763da683882f12ffda40bbe156e33e1282225aeed9088e96c8b856c80ebad7b914000e874fc8de83af11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}