{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x30ddc5754a121535fb60047448248aaaf51d024e809cae28f671524f2aa0a925",
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    "signer": "0x6f6aA6cc738Bd5A8d1620d7B0fc7D852Dc12CdA4",
    "userId": "112550482"
  }
}