{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x549963b839cf313b2ff30eeffb907a06066fb15e5e72562505211afdb89ec40b",
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    "signer": "0xaeb41A91F33b8Da504E11bF402D454f4034ef709",
    "userId": "365339732"
  }
}