{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb10b11459751759136ab0e63dcd17afbad2c37c8f3d7d295bbbb381db826881b",
    "signature": "0x1353fd743c0d25f12793be0f4449f00dfe2f20ebb33f431500e20dc54e7f18c302bd273885e2d16f64aafdfebcfe018d3ff1822805f5352db5e59efa505d86b91b",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}