{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x730f18a35eb76cc02c402f4319a5bceffd4f90632fdde9580fe09712c9fe7453",
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    "signer": "0x9590a7FC32307801cFD04D758af761B7C95a3Ca8",
    "userId": "840971659"
  }
}