{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd018cde9ef1d769ff0b219c8d8deb0d814029124df8abaf2a52253e888a9b641",
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    "signer": "0x005dde3128985d570cF86DFF14c62764E6E1facd",
    "userId": "688127416"
  }
}