{
  "manageEntity": {
    "action": "Update",
    "entityId": "999396914",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraouvya6huw7qrnyugb7hypu4faec5nyli2l6w4d7iygelwoxydsoq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1362308373}]}}}",
    "nonce": "0xee5560ada9b4601a722151a95f3ceb6216849bbe72242e2de38d243375471d94",
    "signature": "0xbed7523f0c055a03a5997a683fac4c4b5726f909dc67f610c6e9bb5a11d5b98829f089c6ef13a974a4e93e7104bc760e9b106428f43601b55459dc3df8dd0d441c",
    "signer": "0x447887A35958D25Fb5B659937312606ec7E55dBb",
    "userId": "999396914"
  }
}