Token

{
  "device_token": "expo-device-id"
}

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "device_token": {
      "minLength": 1,
      "type": "string"
    }
  },
  "required": [
    "device_token"
  ],
  "type": "object"
}