{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x469b6a081bf11184ab1209f018426bddd092baa85472701fb2a666adba3bb76d",
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    "signer": "0x491B54C53C6cD2140A4Fc8C48EB78E19daA57eeB",
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}