{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x21aa1ab8927767cd7cc613b443365263ef811e78d9ea4bdf656ab53b969eafc4",
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    "signer": "0xa42ab150B62A82f20CDd3baDF608cee632b55b60",
    "userId": "695290252"
  }
}