{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc969e909e63f646aa509c35c5079dd60849be267301c6a36bdd3da074783e874",
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    "signer": "0x05D3717De510a9be83D168A5931BD934Ba189d4c",
    "userId": "20274838"
  }
}