{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd1a0de73adb4541856ba6e333dc1a9b649c6fa00b9fc1eea8c02a1a25eaf132e",
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    "signer": "0xEf8800808CA5aa7473F3580ffe7f271A270b470F",
    "userId": "632532838"
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}