{
  "manageEntity": {
    "action": "Save",
    "entityId": "314805081",
    "entityType": "Track",
    "nonce": "0x4e1b359f44577aed6ecf1d8d4a19ea23e20b80dfe229a34c1478a7906d7d7807",
    "signature": "0xd491d3fbe2a87576340219bb66b17934fb7e824a791f3c881359d1b5c84fbbb72c932ba843f3890166775342a3cd8a298fb568e07460a59e5b1d11410528b40b1b",
    "signer": "0x54A7bEEa4225786D727D79eDe3df2AaB446aC63A",
    "userId": "757958666"
  }
}