{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7cba8d466121ae35e91aa1c0c8ab81050d8f0956c3c3cca0c4e3dbedba7573e7",
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    "signer": "0x9E37CE51928d7BE628DDD78bfc08103D9223b362",
    "userId": "466381606"
  }
}