{
  "manageEntity": {
    "action": "Update",
    "entityId": "531755545",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x956e6d90b1c1d324f5006f58b478de2184468d6472324a37af52ade0e7ea92f4",
    "signature": "0xe3fd0191305055b557113de1891ba5d16f764d1d83d8b01a7d3acf95aadd4fcf3e0d102abd60e9f21e5c83897ec7eec4344d146ff5a16d62690b9e7899b253351c",
    "signer": "0x1043Da151F3d07e0E55c08dE7Cb2763524e2DaD0",
    "userId": "531755545"
  }
}