{
  "manageEntity": {
    "action": "Update",
    "entityId": "300284320",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd91f73a3755ab4045a6c9712ec2d8034feb06893364950db5b8ec3dfc9961616",
    "signature": "0x3af41c61e71c5587be28f74e7b5e0f6d2967b787c8c922c4364a75dc1dea5d423b8e9656d09e22437f3538020934c083aaabe2cf0db42c1ef699209a0aeac1c91b",
    "signer": "0xCe28dce78A73b5c96c01000780576613c0b7Cd47",
    "userId": "300284320"
  }
}