{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x57391c063a013c9fc9d2a58bdec460a10196442df450f3b7fa13ac0a69111067",
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    "signer": "0x405Ace7504427469D27C9BFC16447E01B53629B0",
    "userId": "428106775"
  }
}