{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xccc348cc0524b6f06d83e87d5b86cbbba8a2ba7588ac5855ad7cf637e0124d52",
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    "signer": "0xF92E3Be85294Fbc19D37E7c909773B572755f070",
    "userId": "478204378"
  }
}