{
  "manageEntity": {
    "action": "Update",
    "entityId": "377244720",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x537ee9d7cec7df2a57b91bbd6f56bd8a53203f455cf1904a7b9b820f42411732",
    "signature": "0xab07b8ed0a171be51848532db92d80840fccc5213103afb85af014cccfad16bb698ed830563b3714bfdf7e70612d623a479cdfe299b75b74d283ba3400e449121c",
    "signer": "0x2E13a23B80c933b6624801750ADD8Ec151eDaE05",
    "userId": "377244720"
  }
}