{
  "manageEntity": {
    "action": "Update",
    "entityId": "877867675",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x505dfa19d5885422fc8a8964f05fed568707e13d1e3ab1b6339df2385b68ff5c",
    "signature": "0x3bcc6d52c8fdf54f72361eadacd8a12037b3bc9256fe2356763634c7e3943efe7466a4b441520d4100e645285dcc925abe5e7f0f291f1c49230972c86866f4c31b",
    "signer": "0xbd1A6821fa1f5BB75015362Ccf54823531C8aa46",
    "userId": "877867675"
  }
}