{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe9fb15ca3f0e0eee0662e2c15a19b3363ca4b975b529ccc55b41101a50ec8584",
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    "signer": "0xFd97e7840e2361807A097a179fFa5966097d5ec3",
    "userId": "445239884"
  }
}