{
  "manageEntity": {
    "action": "Update",
    "entityId": "300815705",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2fff52e54a4bdb046e44370e9da229ea0d042e42ce168b86487632380cff109e",
    "signature": "0xe5c2019445ab7d540ccc6e000b1313bfaccb83b7dcadae9310a06950037b3f106a93bd0287300071646aa4158442ed210f68b1c247f1763d920cb58f291fb5bd1c",
    "signer": "0x17E5Cd991203390519d2FC47aDbaC0DF4B27bBe3",
    "userId": "300815705"
  }
}