{
  "manageEntity": {
    "action": "Update",
    "entityId": "603916020",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xcb4a58cc9a7972ce1b962021ea59890caaa9fbf1b56b56daea1080d3156e2b32",
    "signature": "0x999b853261053fdc8587e4ff94ccab90aa176028d3085b74a4a1327ece65d03b7ffdb8410d619d184c9fb1635ea49a8f81b6fce63707085e3923155a1e20c2281b",
    "signer": "0xE35DcC5C816D790A9f730B4696F43Caf64d5d1e6",
    "userId": "603916020"
  }
}