{
  "manageEntity": {
    "action": "Save",
    "entityId": "224434422",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe8fb75b536aa2e0e214ea8337db8e51b510263644c8aa2ad1f8b9daf396df34c",
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    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
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}