TASK_PLAY_ANIM

Example Use in C#:
 

public static async void PlayClipset(string dict, string anim, int flag, int duration = -1)
        {
            // PlayClipset("mech_loco_m@generic@reaction@handsup@unarmed@tough", "loop", 31);
            // https://rdr2.mooshe.tv/animations/
            API.RequestAnimDict(dict);
            while (!API.HasAnimDictLoaded(dict))
            {
                await BaseScript.Delay(100);
            }

            if (API.IsEntityPlayingAnim(API.PlayerPedId(), dict, anim, 3))
                API.ClearPedSecondaryTask(API.PlayerPedId());
            else
                Function.Call(Hash.TASK_PLAY_ANIM, API.PlayerPedId(), dict, anim, 1.0f, 8.0f, duration, flag, 0, true, 0, false, 0, false);
        }