{
  "manageEntity": {
    "action": "Update",
    "entityId": "294359809",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieravp4lh5hk4zbbcjn6bzsdl3q636kw653quyu3g6qehf7xgwpxjgla\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":2007455551},{\"type\":\"playlist\",\"playlist_id\":1005309638},{\"type\":\"playlist\",\"playlist_id\":974352861},{\"type\":\"playlist\",\"playlist_id\":1105679833}]}}}",
    "nonce": "0x74688ac6d9332da78a9370cd21085ff3334eee3cbeb73c43de10d9b441141466",
    "signature": "0xf92fe861ac3a3a7744a8336553b256654f27172b79442a85d8184cc8c2a53d1f0581455df2bad6c05ef2242ff07db23b13fdfa042d91494c2db74219d3e7fa0f1b",
    "signer": "0x776FC9416d3338b25E1cbC297e10B7d871211673",
    "userId": "294359809"
  }
}