{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1ec6d8bc43785f6fbe7ca22304e2d44b4dacdb6a9e7b9bc6f10d8b353dc8a3ca",
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    "signer": "0x7F5473dca3C593d21d2389D27A0A93fAD3935976",
    "userId": "788939644"
  }
}