{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x141dacdc1247651163178d397f7f819414733b713a7faa998c0957c6c0af60b6",
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    "signer": "0x70F676768959be648C55d1E2551E02F36a6c97f8",
    "userId": "565332983"
  }
}