{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc56e722eba844a7848b2c593aa53e80f6b37177d59c3e93cc0884626e1b11761",
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    "signer": "0xF7caba079ef22D808d6dC773e39FE95EaDed2202",
    "userId": "618129703"
  }
}