{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x450e627f33436c32c3f0eb8c8d8106e8bf4504b41657f0728e880aeb3ba72906",
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    "signer": "0x734a00137DCDA6aA303E1be6dBD3f9F1B9a989A9",
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}