{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5c87c673216a6261914ad6d997c386c8a77146afa780928fb0d5672b0d681017",
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    "signer": "0x896b123C05f70B6C59Af61AC88A1E62F74a12815",
    "userId": "596135776"
  }
}