{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3f8dfa5d347f013a059124f27bb760d2a4bcc5421e53eca688694212de6db3da",
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    "signer": "0xEB9592D53448FC76CA6a96d703DEceC1FF1Bb5Af",
    "userId": "729166010"
  }
}