{
  "manageEntity": {
    "action": "Update",
    "entityId": "854828390",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieratlbcyi7bcyjy56uzgo3bzoqrdmvyxm35gskys6hikavwxovog2ja\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1833489616}]}}}",
    "nonce": "0xa743484765c2de5491c5e3975bddb1cd373c5b4254d89233ef5c7cf63f2872bc",
    "signature": "0x1f102e359709ddd7ccc09f83f4bc91c84f5331d657be12663d494b1340aa42c930bbf7035e37c5af819c0cc848aed50965e0f8f486487c0a83b01700f7ee4c871b",
    "signer": "0xa8BEF74bDb7cdBA1D7E949228F5112f6af3276b9",
    "userId": "854828390"
  }
}