{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x959f1072026ca324a6bdcdb08f117480fd1078a26405b1ca6d90880e7acf1ee0",
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    "signer": "0xd4D22613a6406cccF0EE962b9d13Efa6A9795F2A",
    "userId": "384241009"
  }
}