{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcb8ed64db5774650e92376646f7dfc84dfbcce40b73e137bb1aff184fe153848",
    "signature": "0xb250ccfae4db8b7a6263c24a6c3dc2ee34797556484596fd73d28a6aab1148f03dec6868a3a383f7348199dbc50ece36fc7206bf24548cda166460543de46b421b",
    "signer": "0xe862752d5754CA4034035D0c731bA7De15D49Ff5",
    "userId": "108308523"
  }
}