{
  "manageEntity": {
    "action": "Save",
    "entityId": "1614466810",
    "entityType": "Track",
    "nonce": "0x0809d923ea2520bf64ea4b6ad9bc6753cd1a43f3a1d6ac511b9a9bec39d60b96",
    "signature": "0xfd468eb5a5049ab82bc547513a8c7af5e8041d1dfe408e82ee29e2cb171d11f9431e114c9b4ad32c3ed4e495779af39e1732a22f34fc38c3a9f19b43662672e81b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}