{
  "manageEntity": {
    "action": "Update",
    "entityId": "644767279",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb2b5769dcc13f2d466c8df1c92f3149c73a3f103586d7c779889c04f71e7fb55",
    "signature": "0x972f1c337160834c73032ff371d2aa8a02cdfa0f9acd958f7a35dbe5ee13d40574c90ac6a094c1ec04bccaf82382eb7441bcb3be9eb4ea878cca0f267bb445f51c",
    "signer": "0xf6c9943016137F3054658e7E14F51B6d271aC325",
    "userId": "644767279"
  }
}