{
  "manageEntity": {
    "action": "Update",
    "entityId": "500389219",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe251ded2fcca10dd1a317a42e4f4557986bc66b6b45144b70072fa7619177b1a",
    "signature": "0x1bae9af0e228bbdf85d9ff93a82bed96b833f155a9b104c9fab8da83fe44ba2352438dbb693820f2a7c06f7fd301756b86da18a826f51b32b84ac9f4ada74b0c1c",
    "signer": "0x400687b92d58Bdbc2853eA4b1D1a72895e5BB191",
    "userId": "500389219"
  }
}