{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xccf7979ef45cf68c5a45b66a3854a1655c4ff756153a311effd54ddbef798e30",
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    "signer": "0xBEdee6321408287569293D9Ef8Ad70772844FAE4",
    "userId": "880443075"
  }
}