{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x36f72715422112c0c2930eb055acc9cd40ed1bae0411d37973eeaa682cd99d5c",
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    "signer": "0xAc0674d83cc7DBd4365a718C9109DF82FFAc0a7a",
    "userId": "60753512"
  }
}