{
  "manageEntity": {
    "action": "Update",
    "entityId": "683894975",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x0f2b917c1b244e112ae82b983506f073db2562f06fffba97b46c53eae23f57a1",
    "signature": "0x758c2efec9b5bf62f6c2e18a886f01b21275f6225f9c8f19313f3e918ef35737170eb2d897da15b8d5079da451df3ebfe6693af0c4c1a07da7d3272053c602c51c",
    "signer": "0x2E421648958D2Eca9f5AA96E378e89773A0f1Cc8",
    "userId": "683894975"
  }
}