{
  "manageEntity": {
    "action": "Update",
    "entityId": "554920508",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7e508bcb9839383fb78ab52e1e206c3e08878ff15e4a025077047488674f812a",
    "signature": "0x35494d75ace022fbcd2292cb8f2d4591d218fc6423d2e74b171494f4eca5498424aa09fd15dd5929837537cd13721d3774caa4454bd7e5c2cd773e1714bb89a21b",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}