{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x94cbe59fd79c034fc118cbb83edecd07cf26d2af67ebbc578316bc3169165eb1",
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    "signer": "0x018fbC33CC778209B821C14f95CBe0C368E33bda",
    "userId": "603150527"
  }
}