{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb990d680ac29e397ec01f17963ebb44924e5c716981b9e2156769de035a1eee7",
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    "signer": "0xD5f034a1974364f9cD887d2fFdaEf2B669309DaE",
    "userId": "280627015"
  }
}