{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x09aae0c53826a4dce2df562ccd843b66731454d175f481f9136a78e5d5806953",
    "signature": "0xce70095b9141f141c612a02d9716290d165f5b3a260cf8acfd3e9dcaea58816f3ba2e62889fc223e41c0ff5f98eac5fe4a88629eb7ef388b18765f2df932eb421c",
    "signer": "0x64CC4E026f6dB17d53032e4D310CDdCD6A47c371",
    "userId": "693381038"
  }
}