{
  "manageEntity": {
    "action": "Update",
    "entityId": "139987211",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraqn3tpf7eahypbmcv2dieociavuojpdiaj7y7bnamufkjsnu2ju2q\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":35711}]}}}",
    "nonce": "0x392e4fa4d687d6b072b9329c8f19a291bc1d8a3971f32a0ad1cea682baef2954",
    "signature": "0x36e4238503a2fe105a0aec5c8c20a55682f2e4323583b725fd8a447b3cf257602084641ac1e21375ebd4eee0fa26ce1aa04ad4ff93f6700edd2bdae86845c8011c",
    "signer": "0x4477BfB16a41f0703acC6F4AC51e189Fda9d8F68",
    "userId": "139987211"
  }
}