{
  "manageEntity": {
    "action": "Update",
    "entityId": "48923931",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x629ea46047560d070d2d5a3607ea2b06d27e171835005624a9d64442a9940960",
    "signature": "0xb8b02cbe649b2095ea1a91f105d95a9852dd70dabcc787a699cd0a6c46857d566702acad303f512237d720c772de504adc783c31e213619fcd3d9b35acfaf47e1c",
    "signer": "0xa9A8559aCdeae56016E2c1656A641b774DEE9c20",
    "userId": "48923931"
  }
}