{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4c0c317b07ab12481dd2d05f8c59b42365d1fe85e127155c2dad542b940d8ae5",
    "signature": "0xe1e4025d50d92467fefb58b59863d3e724ed072028988340e189e7bd346b94164939ddf3462594eb7beb97f09fdab6c7311609528bd1085d2a515b58c49430491b",
    "signer": "0xDA5EF39662B4ef70B52C25F33b5637165C93DE3c",
    "userId": "479039338"
  }
}