{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x91112196144389347f5eba5902774d02dbc9347caf5b07c560e6079f49e97f81",
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    "signer": "0xe886CF663F987EeEA6c0F53715116742bcDBDbc2",
    "userId": "737149335"
  }
}