{
  "manageEntity": {
    "action": "Update",
    "entityId": "921884478",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x23c83b14bbed937e0135fc1c6aa592d2fc50d9fe17fe16ae57bad1d89b39d21e",
    "signature": "0xcc87870dfc0b0ef999abf8a384ced1499229bf7f14d0ded42879948269f4492f6c1b9acd982df7d12ea7a17b6eed00311354b8a1269f6e7d248612227cd1fce21b",
    "signer": "0x502e221791BBAb2Cb01c3ce8a22B9500AFd3E93F",
    "userId": "921884478"
  }
}