{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xac4cc8514e1646f9adb6e0c3712caf56240f372a4c5769614c9cecb44f5c4aa2",
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    "signer": "0x03eBd76f03fee1b68d042AE492e5168848BEb443",
    "userId": "180170571"
  }
}