{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0aa5e589631e197feb59c20170656c09043a81377dd322ca80401ccea8d5a09d",
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    "signer": "0x83968a6b9255Ed8eBc57cF77a69694Dc70d13C61",
    "userId": "103803867"
  }
}