{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7ec7c052c951e92964ca7d024cb86d159f29150220c72ac1f957da3196101fd9",
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    "signer": "0xe30f44C203C5AE52Ea3b6258Ce77B4B8Ae905Ff5",
    "userId": "417803337"
  }
}