{
  "manageEntity": {
    "action": "Save",
    "entityId": "1065717",
    "entityType": "Track",
    "nonce": "0x2b10349eb702ea644b409f8153b13ed004e5f94714793680913a057ea260e339",
    "signature": "0xed4624d9043b613c4e424f150d25bed106d851f3228449d6515269cee0324db221a3e4ba2dba1adb3b0278e904cacac11985a7d3199f5e2dbb0002f5c5328f051c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}