{
  "manageEntity": {
    "action": "Update",
    "entityId": "621738482",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9a26e70e4e836986a1c14ae0a9753b34e81067e23d5b79766ac559e63d1bb471",
    "signature": "0x0856f4eb9e70daf01520b60bc8631405567ff6f524759744d33bd7993961a77176831e68f6de4774ec8aa0df4f96917eded9f124ca94b0c8511ef1ae5b6d5cd71b",
    "signer": "0x7C8aaCD05285e30d402BFF67359FCC5d87133207",
    "userId": "621738482"
  }
}