{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x353926b03a4102d6d26f86d3f4a610738ab44d2f24174cde2c2a11d28e02b223",
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    "signer": "0xfDDc1Cc4CFC91b88b14E9682daE7011b2a3F328e",
    "userId": "433579009"
  }
}