{
  "manageEntity": {
    "action": "Update",
    "entityId": "212312873",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierakidkvupcrlqcucux2brpnhshhb3s4plvw6flrgctfs3osvhpotea\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1699393910},{\"type\":\"playlist\",\"playlist_id\":1535290565},{\"type\":\"playlist\",\"playlist_id\":670934932}]}}}",
    "nonce": "0xf37ff6d1c2faddfe7eb7cfc09df70ee55a75eba266804409f869ebfbd9e5abc4",
    "signature": "0xd4baa1abfd8ca901b07df396b8e9051f2532cf9ccf3681e75fa2b818d5a747782adff3cdfb22ee8e0146369dfe874c1a3ae0876fac63768efd728aca9f28f77b1c",
    "signer": "0x461f50A3fc0AA622131648471C182e53ad62eD7f",
    "userId": "212312873"
  }
}