{
  "manageEntity": {
    "action": "Save",
    "entityId": "406158",
    "entityType": "Track",
    "nonce": "0x55dade3df8dc6c563fd82a059b75c40b34d70c01d1c2b0f01e011f0792cf5b8c",
    "signature": "0x1e6000ed5cac37e6672efbd5c0a45d1aa2ca255a9d8b58b72ca616a603f911c57d4504579e65e7c3fdaa38ef43a58c7b36eefba0635e1f292234d175ffcdc3e81c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}