Converting Tick or Epoch to Timestamp in Logic App

aad-response.json

{
  "token_type": "Bearer",
  "access_token": "[ACCESS_TOKEN_VALUE]",
  "expires_on": "1536543296",
  "not_before": "[ANOTHER_EPOCH_VALUE]"
}

convert-epoch-to-timestamp.yaml

ConvertEpochToTimestamp:
  type: Compose
  runAfter:
    GetTimestampInEpoch:
    - Succeeded
  inputs:
    timestamp1: "@addToTime('1970-01-01T00:00:00Z', 1536543296, 'Second')"
    timestamp2: "@addSeconds('1970-01-01T00:00:00Z', 1536543296)"

convert-ticks-to-timestamp.yaml

GetTimestampInEpoch:
  type: Compose
  runAfter:
    GetTimestampInTicks:
    - Succeeded
    Get1970TimestampInTicks:
    - Succeeded
  inputs:
    epoch: "@div(sub(636721400967890200, 621355968000000000), 10000000)"
ConvertTicksToTimestamp:
  type: Compose
  runAfter:
    GetTimestampInEpoch:
    - Succeeded
  inputs:
    timestamp: "@addToTime('1970-01-01T00:00:00Z', outputs('GetTimestampInEpoch').epoch, 'Second')"

get-timestamp-in-epoch.yaml

GetTimestampInTicks:
  type: Compose
  runAfter: {}
  inputs:
    ticks: "@ticks('2018-09-10T12:34:56+11:00')"
Get1970TimestampInTicks:
  type: Compose
  runAfter: {}
  inputs:
    ticks: "@ticks('1970-01-01T00:00:00Z')"
GetTimestampInEpoch:
  type: Compose
  runAfter:
    GetTimestampInTicks:
    - Succeeded
    Get1970TimestampInTicks:
    - Succeeded
  inputs:
    epoch: "@div(sub(outputs('GetTimestampInTicks').ticks, outputs('Get1970TimestampInTicks').ticks), 10000000)"

get-timestamp-in-ticks.yaml

GetTimestampInTicks:
  type: Compose
  runAfter: {}
  inputs:
    ticks: "@ticks('2018-09-10T12:34:56+11:00')"