{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x95be3a7a135a399406cc97eca8eef0b8c38dcb108fc88c80a4fd2c92bcb7ac8d",
    "signature": "0xb7c8eb1b7b87de8f3fca0b5b4c4aef4d9fabe90cdfdc758511e42846e5824e90155ea202c829d7420547e1ba9bc999fa91aba9bfbeb024a1f52e027d90f778a31b",
    "signer": "0xfF5960575b86a2c907204fB0AdF324ea6B029877",
    "userId": "908625324"
  }
}