{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6cee3e69badef37fc2eb9f34a508e5d9c890d497fdd6819036a676df3a0d74f4",
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    "signer": "0x9DC722Bb28369653d355D6503Ecb6025da3DDfc5",
    "userId": "293510160"
  }
}