{
  "manageEntity": {
    "action": "Update",
    "entityId": "603916020",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x44b8632125950c3cfa1c196c417b61b00a405e4d112c29a4ac14d0cbf3b927ad",
    "signature": "0xaf696a8c0e6f82cf08c626a95d97875c66399a1118468aa57212e4fb0e70dde37f52f243b162fa2c5b80a7b81cf62f402b35f5af5402251e15f0520b3a5566451c",
    "signer": "0xE35DcC5C816D790A9f730B4696F43Caf64d5d1e6",
    "userId": "603916020"
  }
}