{
  "manageEntity": {
    "action": "Update",
    "entityId": "603916020",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x26e5fd4bcb99accf5e6270bfafef3d336b1c76a8a262fd11443122a25479a1d1",
    "signature": "0x4ab3965ea548f2956620288bb82dadf223033b5f4b707b7cf663c21c2664392c1523692efe555dfd37b8a4257d886608e174bb8c490c26581d516bf39ed58a351c",
    "signer": "0xE35DcC5C816D790A9f730B4696F43Caf64d5d1e6",
    "userId": "603916020"
  }
}