{
  "manageEntity": {
    "action": "Update",
    "entityId": "451708212",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x90b5807628cf0f50c55926096dc721dcd1f41e429722fa0d8943fb95ca66ec31",
    "signature": "0xf498a3219782120368cbe3938b83db1155772d01cb146147d59008d253d3ff7b3fac0b5677a6f49b9bda6c31e444eeaaed2b72497802a268d3c614fa4d34cbb01c",
    "signer": "0x6B2Da146c470972DE088AF9d1115Cdd3cae54637",
    "userId": "451708212"
  }
}