{
  "manageEntity": {
    "action": "Update",
    "entityId": "375002735",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa53d4bf99dbab0a40fa04b28078b6ae289c8080f4c65b3224ee290d86a45e1b4",
    "signature": "0x83c805d245955aac6b59bd319e356b3c67eeaa3e770433cbcfb6675069ecd8331273bb93a99aec5af85c05362e3ec77b9eeb62a6eedbd281e20b34d411fb148c1b",
    "signer": "0x6253a5487Ca5ADB465668B7122aa0cea88950f8D",
    "userId": "375002735"
  }
}