{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x67a24b48f0021c8546e6f1bcf69eb0b8d7c90c3deca4160e88b6a85246b2367d",
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    "signer": "0x18CfcD408A9aA03DC22344F8B1CA1D9543f3170E",
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  }
}