{
  "manageEntity": {
    "action": "Save",
    "entityId": "1952621516",
    "entityType": "Track",
    "nonce": "0xbd4633ffa3919e72267154d52b4bbb6af5d3ba7231146fbae7f20b50c95d2ddd",
    "signature": "0x57aed3d08f38ab257802b97388ccc3eb48bacaf9ff4c6f89a9f1b13184aa9ced4b2937fc09f60434d7ea4d2d3640050e48f88157e26846750c524cf831c17aec1c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}