{
  "manageEntity": {
    "action": "Update",
    "entityId": "552421234",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd7361b04f951626c141e62a85952f02b60e1e89d3cf972782a310f911c851be8",
    "signature": "0x4ab73eaa9d442d5c0f7b2329f6bbcb95081c2aad5c2b25aa0480e98c132c3ad35e2ca1c9e3c6164537ff97c0a0fa097b01b737aa3a7dc0cca79a7037ba22a1021c",
    "signer": "0xf9B2e6c4AD8D7302B8CD57332e90D0C18d7C1522",
    "userId": "552421234"
  }
}