{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6b7d05cd0fc7b4ec315e51cdf224fc12edf8c134f59b410f46748f7faf60bf47",
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    "signer": "0x216825d141Adea3A0A5a65aD345DB831Df6fF225",
    "userId": "842509080"
  }
}