{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6fbb2d11d71a769b1df29c565330dec780144833db0e82381b95c1e829d66c50",
    "signature": "0x453280578ced3c695769138a786f6b0051ceda3a6acf53005e353193d1d9b84f64c9926cc3a8a59b61a06239994f850f55d6bec345c3533cd234066b6bb227e41b",
    "signer": "0xF3329D37206D9EE99ea06a64E66DcC147c8df649",
    "userId": "272485393"
  }
}