{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdbede87d11467c8824f483aea49ddf2115c74d698f0974b7be503e9b4abe241c",
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    "signer": "0x6C801E827B7D7F16C22caBA0f9cD4D2142aE0D49",
    "userId": "303562986"
  }
}