{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb1a20333d97616143165f28a054ca1638dc22ea309d3d55d56f745768d73f167",
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    "signer": "0x314D77b75171AC7C89c8787106d3b63262c769EE",
    "userId": "667857623"
  }
}