{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5faa590f091efec3737a35fed818fbd0c20648403033484a9f59d9482bb71173",
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    "signer": "0x8659eFeD52fe64Fe2856EC51b845749cb08fa0FB",
    "userId": "570816621"
  }
}