{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0cc4f7f63a36adcb6e7347ce1cac1983f8dbe68055f04bbe1109d598bc43bddd",
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    "signer": "0x7Eec440C3674292A66f7e20C5E6efAeaE5956B9a",
    "userId": "18002392"
  }
}