This is the consecration used in the Marian Movement of Priests Cenacles.
This particular consecration is intended for young people.
There are separate consecrations for priests (#1,)
and for religious and adult laity (#2.)

Consecration to the Immaculate Heart of Mary

Virgin of Fatima, my dearly beloved Mother,
I who belong to the Marian Movement of Priests,
consecrate myself today, in a very special way,
to your Immaculate Heart.

By this solemn act, I offer my whole life to you,
my heart, my soul, my body
and especially this time of my youth
in which I am now living

Guide me along the way that Jesus has traced out for us:
The way of love, of goodness and of sanctity.

Help me to flee from sin, from evil
and from egoism and to resist temptations
to violence, to impurity, and to drugs.

I promise you to go to confession often
and to receive Jesus into my heart
as my spiritual food of life,
to observe the commandments of God
and to walk along the road of love and purity.

I want to be a witness of unity
by my great love for the Pope,
for my bishop, and for my priests.

I love you, O sweetest Mother of mine,
and I offer you my youth for the triumph
of your Immaculate Heart in the world.