{
  "manageEntity": {
    "action": "Update",
    "entityId": "900921934",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9a12a949eba2e0ba74b421c1295b679abf45114aaa9f4940cbf3c7d86922b674",
    "signature": "0xb06088a3ec6399f50ccc64605895213023307e7b06c06eb2f529cc77b0cbf1776c0e471993f1ba5abacfc756bca049189fe3904b4af1288d74744a9526c52fc21c",
    "signer": "0x4B4356D9aB454Dd5241EFCA0A817E0c6304D8186",
    "userId": "900921934"
  }
}