{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x82971fc5e9f182bd8548dd7b805da0d4061db263bcf15783c898238dd9047c64",
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    "signer": "0x3BCF1f860B3538928156F6F30EA34f741917e098",
    "userId": "476541764"
  }
}