<dependency>
  <groupId>org.whispersystems</groupId>
  <artifactId>signal-service-android</artifactId>
  <version>2.15.3</version>
  <type>aar</type>
</dependency>

implementation 'org.whispersystems:signal-service-android:2.15.3'

implementation("org.whispersystems:signal-service-android:2.15.3")

libraryDependencies += "org.whispersystems" % "signal-service-android" % "2.15.3"

@Grapes(
  @Grab(group='org.whispersystems', module='signal-service-android', version='2.15.3')
)

<dependency org="org.whispersystems" name="signal-service-android" rev="2.15.3" />

[org.whispersystems/signal-service-android "2.15.3"]

'org.whispersystems:signal-service-android:jar:2.15.3'