{
  "manageEntity": {
    "action": "Save",
    "entityId": "1575075896",
    "entityType": "Track",
    "nonce": "0xae5b59a9a6f49df92ee08ee2536016391786856d191e1771425d42d56e2018a6",
    "signature": "0x78502f230a8e0b03372f895ff78f16ac492243e5544860cd3596fa33b5644c0e674690f984e02c6f4ae2af93f4e9aedc16e73b8089a43f9420526cb206c4a7f11b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}