{
  "manageEntity": {
    "action": "Update",
    "entityId": "850489604",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierazp2kof6h4pznc5vjcqx67pwkfn6ssjro654dv3ngyydfklig5bsq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1248699039}]}}}",
    "nonce": "0x1f99f3dbf005377b1456d90070bed4e269d8ca3fb7e9c31b53fd31ec525b16f2",
    "signature": "0x2a5e52b5a9d9297424dc5f2f13840f42efda311ee18241104c2a44fa934fa2d9510c2da4b46ab059dd3dbd58f673ad68d2ed23cfebaa83522f0fb2e48bad87dd1b",
    "signer": "0xE58798A8eCCb4b8474bdDB89D94c8151E7BD4D10",
    "userId": "850489604"
  }
}