{
  "manageEntity": {
    "action": "Update",
    "entityId": "338949331",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8a78457e14bb03165be8e6f95d640667a7fd3cddf27ebde4f9b40e5953509662",
    "signature": "0xb09505cc3f1a27189446f6fc6cf0b6e8ae2e5da87887eebb215cc31671d2489a7ad8833ccbec2049071b2bad8f6bb88ad977cae7b0fc0234797f17713a3775711b",
    "signer": "0x31cE923A8b73598247D8639D61384308dAB45c94",
    "userId": "338949331"
  }
}