{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1fbffe23ebfb546c78ef64040575648d4b9fd7880c81cf57cab16f851ccc35a2",
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    "signer": "0x55468B5b5E23C33f7E9D5569ba2E65189f8206C7",
    "userId": "158468791"
  }
}