{
  "manageEntity": {
    "action": "Update",
    "entityId": "643398821",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd71dc012ff7843194f6c44bd1a1e7a52f4cb4404bd580966d43da23552c4cf0e",
    "signature": "0x5bc6e628ff8d8e3bf71ca7fc89ad3f02dff5c3363953cd208f9a9ea1a73aee5c73641cc58f25050538db11652cee0a98a8c0d683d6ae18a613e6aa6e5ef656541b",
    "signer": "0xCDad39c211C3eB59f1cE1874416292966f4752e1",
    "userId": "643398821"
  }
}