{
  "manageEntity": {
    "action": "Update",
    "entityId": "603916020",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb0f6cf56c64b33b8f3ef85ad1795703797e6230f09096ebc46e48c1c00bb61fa",
    "signature": "0x0f51c460f3720028abf0b44ff996df2a9199ee0d7e010c59c865f7f45090a32a404c12c1ecc619db1932260ea209d31751dd884253b3181018d15be23f3d31451b",
    "signer": "0xE35DcC5C816D790A9f730B4696F43Caf64d5d1e6",
    "userId": "603916020"
  }
}