{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x263fd41d23cf38dc6514c451d1c23890635342ab3427343a4a818dbd32f3753a",
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    "signer": "0x039B373889390834C72BfEdd1fCa4e39ecA8FC3e",
    "userId": "805960080"
  }
}