{
  "manageEntity": {
    "action": "Update",
    "entityId": "515069310",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xeb313b7aa30dfc41d8137b2678fdcfe456fd371abfbe39a3996f3c194c5fb44b",
    "signature": "0x2e1e8c069247e65b887412ea848dbff0f47c4fe2eccd1c537d0d0d43ce20d90e4005b2ca0dbf000a72d7a95ee09ed9cd231c150ef0ff8001d468256ef41ec0501c",
    "signer": "0x187F60418Adb90F0a85fec4090c1694A14708820",
    "userId": "515069310"
  }
}