{
  "manageEntity": {
    "action": "Update",
    "entityId": "576591920",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3c454007946c56943d5af715d9549aca51031eaec014646f1077aec54bca392b",
    "signature": "0x212b5245b91d2a857216cf8e1ce9764037f9936f4e9a179ba9a9faf4a6536655715840fd7df5bff053cd5ae4e61bc6acad0a69c24a5ebe00df1c9fa84dc54f791b",
    "signer": "0x11536D52aE5b63C6Be05650c1Fb39F11159c2031",
    "userId": "576591920"
  }
}