{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x410eef8d8aa00dc7df3031d55ef6dcf0f51c72db3367343f5c897c830182c854",
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    "signer": "0xeC35faD99f57B621720084Caff5a3D547F43855e",
    "userId": "523955400"
  }
}