{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb46a2ce2142322954ad39b1aa254869a9ce855970410c9d0a81390f37c995959",
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    "signer": "0x0570674e97DE2560cb7c94240BAe25BCAA447a9A",
    "userId": "85928258"
  }
}