{
  "manageEntity": {
    "action": "Update",
    "entityId": "612535858",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierasj4zavzfwh6uifgon5ok7mymal5hd3qnnft3tatmhoadxen53awq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":9733393},{\"type\":\"playlist\",\"playlist_id\":1759934957},{\"type\":\"playlist\",\"playlist_id\":76026918},{\"type\":\"playlist\",\"playlist_id\":173449831}]}}}",
    "nonce": "0x462cf542fe026a4515ac6520b6f0e837cbc36fc474095e62be6d0c31b48f0abd",
    "signature": "0xdf83f0d7b0f9dcc56782fd3d8ca9c881cfc1f472a4c7868208be3ecd9a47a47e01497eebf64f923e163fd562950a6adf499dd8d0294574b592e1bc4078fd76a11c",
    "signer": "0x473ac84E91B21C4fEEa96a0742db8bAeDC7F3A5e",
    "userId": "612535858"
  }
}