{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8d69f0c28dbcdfc3409aee796e2fdd1c0590fb0ce66f57d7ea1e38c389d90363",
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    "signer": "0xCDb8F390F2d5D6a1687a289dFDE48b06f3403872",
    "userId": "176094510"
  }
}