{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2c0dbf869705420319688396ccc43de24d32db670072f8dfc901fc73401850fa",
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    "signer": "0xb94b5945e69EfdBfCFD70c33880719283cC5950a",
    "userId": "850401302"
  }
}