{
  "manageEntity": {
    "action": "Update",
    "entityId": "721987098",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa70a107be5b655cd3e75c606bbe0a7adf899c30fef8c4409ea4c389efc27ea7c",
    "signature": "0x006e16a9dcf67e6c23cf1e56813bf1185c8d1378f039f9f4cc5cc8c13be7e99c789bf840aa8f225da2acae2cc67bc028017a17924f948d932d039e58907c4bda1c",
    "signer": "0x4c2B6D597D288449d9F215489E66f1cCe1c85B8F",
    "userId": "721987098"
  }
}