The heading for this is unique. It describes a specific situation in which the psalm can be prayed. It mentions no individual or group generally associated with the psalm nor any musical terms.

102:1-2 An urgent call for God to hear his prayer

102:3-11 His crisis. He is overwhelmed by life's brevity, pain, his suffering and loneliness. God's anger seems behind it all.

102:12-22 But You... God's eternity (12, 24, 25, 26, 27) is an answer to man's brevity.

102:23-24 He once again focuses on his individual crisis.

102:25-27 The LORD's eternity will outlast the heavens and earth. Hebrews 1:10-12 will quote these verses as being fulfilled in Jesus.