{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbfe55547e06077eef48e669ecc6571e02d3934cd99d5564996a1a0264aecdfb0",
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    "signer": "0xDf42E5ab5C73f1ae28517b1c3de83C05589562DC",
    "userId": "538487490"
  }
}