{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0a72bcb138cf0336adcab781386b59fcb602b0693345629ca0faeaef17de51f7",
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    "signer": "0x128a21125C52D203631b9833393f59AA73c35b9b",
    "userId": "553042995"
  }
}