{
  "manageEntity": {
    "action": "Update",
    "entityId": "721987098",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x86d95c7da925a6ee63540d67f1ff90546e52c8bcd87599029508ae45ce28ce8d",
    "signature": "0x6d65db484f48363e204f934bbb438161f6c1b70be500468f8f182861083304a646993959f8796871a72c2eee464ce646acb2004427287f8c35c6219c944b533c1c",
    "signer": "0x4c2B6D597D288449d9F215489E66f1cCe1c85B8F",
    "userId": "721987098"
  }
}